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SDMS DocID 284285 METHOD TO2 Volatile Organic Compounds in Air SitetfOaSTl Other; J - •V/" 7 ~~ DATE: July 2, 1992 1.0 SCOPE AND APPLICATION: Thia method Describes the analytical procedures used to determine the amount of volatile organic compounds trapped on Supeloo, Inc. Carfcctrap air tubes using a gag chromatograph ion trap detector. Thia method ia intended to meet the Duality control requirements of USEPA Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air, £?&-600 14-84-041, April 1934, Method T02. 2.0 SUMMARY OF METHODs Carbotrap tubes are heated in order to transfer the captured organica onto a fused silica capillary column. An ion trap detector is used for analyte detection. Analytes are confirmed by spectral identification. See Table 1 for the list of compounds and reporting limits. The Carbotrap 300 tube contains 3 types of absorbent material. Flu sections from front to back are Carbotrap c graphitized carbon black, carbotr-ip graphatized carbon black and Carbosieva s-III molecular sieve. The back bed of Carbosieva S-lll traps gases such as vinyl chloride, the middle bed, carbotrap traps Cg-Cg compounds, and the front bed, Carbotrap C traps the heavier compounds. See Appendix A for published literature from Supelco, Inc. 3.0 APPARATUS AND MATERIALS: A. Instrumentation 1. Varian 3400 Gas Chromatograph equipped with split/splitlese injector. 2. Finnigan ITS40 ion Trap Detector 3. Envirochem Model 851 Thermal Desorber 4. Tekmar LSC-2 Purge and Trap B. Fused Silica Capillary Column DB-624, 75 x 0.33, 3.0 um film thickness C. Data System - The data system being used is the Finnigan ITS40 software, version 2.00. 4.0 REAOEMTS: A. Solvents 1. Methanol - purge and trap quality 2. Reagent Hater - organic free water
Transcript
Page 1: METHOD TO2 SitetfOaSTl - semspub.epa.gov

SDMS DocID 284285

METHOD TO2 Volatile Organic Compounds in Air SitetfOaSTl

Other J -bullV7~~ DATE July 2 1992

10 SCOPE AND APPLICATION Thia method Describes the analytical procedures used to determine the amount of volatile organic compounds trapped on Supeloo Inc Carfcctrap air tubes using a gag chromatograph ion trap detector

Thia method ia intended to meet the Duality control requirements of USEPA Compendium of Methods for the Determination of Toxic Organic Compounds in Ambient Air poundamp-600 14-84-041 April 1934 Method T02

20 SUMMARY OF METHODs Carbotrap tubes are heated in order to transfer the captured organica onto a fused silica capillary column An ion trap detector is used for analyte detection Analytes are confirmed by spectral identification See Table 1 for the list of compounds and reporting limits

The Carbotrap 300 tube contains 3 types of absorbent material Flu sections from front to back are Carbotrap c graphitized carbon black carbotr-ip graphatized carbon black and Carbosieva s-III molecular sieve The back bed of Carbosieva S-lll traps gases such as vinyl chloride the middle bed carbotrap traps Cg-Cg compounds and the front bed Carbotrap C traps the heavier compounds See Appendix A for published literature from Supelco Inc

30 APPARATUS AND MATERIALS A Instrumentation

1 Varian 3400 Gas Chromatograph equipped with splitsplitlese injector

2 Finnigan ITS40 ion Trap Detector 3 Envirochem Model 851 Thermal Desorber 4 Tekmar LSC-2 Purge and Trap

B Fused Silica Capillary Column DB-624 75 x 033 30 um film thickness

C Data System - The data system being used is the Finnigan ITS40 software version 200

40 REAOEMTS A Solvents

1 Methanol - purge and trap quality 2 Reagent Hater - organic free water

Revision 3-Q Date 08Q792

Method TO2 Paoa 2 of I B Stock Standards

Standards tor this method are purchased from Restek Corporation and Chen Serv with tha necessary data packages or standards are made from pure materials The stock standards for this method are the following

a Beatek VOA Calibration Mix 4 - Catalog No 30009 2000 mg1 in methanol

b Peatek VOA Calibration Mix 5 - catalog No 30010 2000 mg1 in methanol

c Aquatec 602 Mix (11199102) 500 mgl in methanol d Aquatec GCMS VOA Calibration Mix 3 (061391) 2000

mg1 in methanol a Aquatec Trichlorofluorsma-thane Standard (OS079104)

5000 mg1 in methanol g Restek VOA Internal Mix Catalog No 30011 2500 mg1

in methanol

C Working Standards a 100 mg1 working standard

500 ul Reatek Mix 4 2GCO mg1 SOO ul Restek Mix 5 2000 mg1 2000 ul 602 Mix 500 mg1 SOO ul GCMS Mix 3 2000 mg1 200 ul Trichlorofluoronethane Standard 5000 mg1 6300 ul methanol

b 20 mg1 working standard

2000 ul 100 mg1 working standard 6000 ul methanol

c 5 mg1 working standard

2500 ul 20 mg1 working standard 7500 ml methanol

D standards for calibration are introduced to the analytical system via the thermal desorber to replicate the flow pattern of the sample analytes A known amount of standard is injected onto the front bed of Carbotrap C and thermally desorbed as the samples are performed

50 INSTRUMENT SET-UPj The thermal descrber transfer line is directly connected to the inlet of the purge and trap vessel The helium carrier gas containing the organic analytes is purged through 2 ml of reagent water in order to scrub polar organics such as the methanol used for standards from tha sample The organics are refocused on the LSC-2 trap and thermally desorbed onto the GC column

4 Reviaion 30 Date 080792

Method TO2 __ Page 3 of 7 A Thermal De-iorber

DesorJgt Temp - 400C Desori Time - 5 min Bake Tamp - 400C Bake Time - 5 min

B LSC-2 Purge amp Trap - two millil^tera of reajent watar is transferred in the 5 ml purge vessel

Purge Time - 70 Day Purge Time - 20 Predeaorb Temp -40 Desorb Temp - ISO4

Desorb Time -20 Bake Temp - 220 Bake Time -70

- The trap used consists of 23 Tenax 13 carbosieve S-ZI - The purge and trap transfer line is directly connected to the capillary column

C Varian 3400 Gas Chroznatograph Initial Temp - 40degC Initial Time - 4 min Ramp Rate - 10degmin Final Temp - 200laquoC Final Time raquo 1 min

60 CARTRIDGE PREPARATION Cartridges are prepared by purging ultra high purity helium at a flow of 50mlmm through each tube thermally heated to 400c for 10 minutes After 10 minutes the tube is cooled to room temperature while still connected to the helium gas The tube is removed and stored in a Teflon lined screw glass tube The cartridges must be used within 2 weeks of being baked

Prior to field sampling 5 of the tubes mulaquot be analyzed for blank contamination The batches of tubes are acceptable if there are no analytes of interest greater than lOng

70 INITIAL CALIBRATIONI A Before analysis may begin the ion trap detector must ba

toned using bromofluorobensena (BFB) BFB ia used instead of FC-43 in order to tune the detector the same as in the USSPA Methods 624 and 524 which are purge and trap methods for volatile organic compounds

Revision 30 Dates 080792

Method TO2 _____ __ _____ ______ Page 4 of 7 Bromof luorobenzene (BFB) must meat the following specifications Mass Ton abundance Criteria

50 80-400 percent of mass 95 75 300-660 percent of mass 95 95 base peak 100 percent of naao 95 96 50 - 90 percent of trass 95 (see note) 173 leas than 20 percent of mass 174 174 500 - 1200 percent of mass 9S 175 40 - 90 percent of mass 174 176 930 - 1010 percent cf mass 174 177 50 - 90 percent of mass 176

Note All ion abundances must be normalized to m_ 95 the nominal base peak even though the ion abundance of mz 174 may be up to 120 par cent that of mz 95

B A 5 point curve containing all analytes of interest must be analyzed at the following amounts 10 20 50 200 and 500 ng Using a quadratic equation the correlation coefficient of aach compound used for quantisation must be greater than 0990

c The asymmetry factor should be between 08 and 20 for the following analytes

1 benzene 2 methylene chloride 3- tetrachloroethene

D A Quality Control Check Standard at 30 ng should be analyzed after the 5 point calibration See Table 1 for acceptable recovery limit- The quality control standard ia prepared the same as the standards are prepared

E- Instrument Blank - Before analysis of samples should start an acceptable instrument blank must be acquired An acceptable method blank contains all analyte at leaa than one half the reporting limit

F The initial calibration sequence is as followsj

2 10 ng 3 20 ng 4 50 ng 5 200 ng 6 500 ng 7 8

80 CONTINUING CALIBRATION A The mid-level standard must be analyzed within 12 hours of

the previous standard The response factor must be plusmn 20 of the initial mid-level standard to continue analysis

Revision 30 Date 080792

Method TO2 Pacte 5 of 7 The first 12 hour time period aftar the calibration curve starta at the injection of the 500 ng standard For the following analytical windows the start time of the 12 hour window ia at the injection of the instrument blank prior to the SOng check standard

B Instrument Blanks - Instrument blanks must be analyzed every 10 samples Instrument blank must not have any analytes above one half the reporting limit If an instrument blank fails previous analysis must be reviewed for possible contamination

C The continuing analysis is as followsi 6 500 ng - start time of first analytical 12 hour

window (Note This is the SOOug standard at the end of the calibration)

7 QCS 8 VIBLKM 9-19 samples 19 VIBLK 20-29 samples 30 V1BLK - start of second analytical 12 hour window 31 50no Check Standard - must be analyzed before first

12 hour window ends

90 SAMPLE ANALYSIS Before samples blanks and standards are analyzed they are fortified with surrogate and intarnal standard compounds

Internal Standard Spike amount 14-difluorobenzene 100 ng Chlorobenzene-ds 100 ng Bromochloromethane 100 ng

Surrogate Spike Amount l2-dichloroethane-d4 200 ng

20deg nToluene-daBromofluorobenzane 200 ng

The internal standard recovery should be within 50 to 150 of the average area counts from the five point calibration

The surrogate standard recovery should be 75-125 of the true value

MatrixMatrix Duplicate Analysis - In general samples for matrix and matrix spike analysis will be spike data 100 ng The recovery limits are 75-123 of the true value The reproducibility of the results should be plusmn 25

100 IDENTIFICATION Identification of analytes is performed by comparing retention tines of the standards with the samples Analytes are confirmed by spectral identification

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 2: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Revision 3-Q Date 08Q792

Method TO2 Paoa 2 of I B Stock Standards

Standards tor this method are purchased from Restek Corporation and Chen Serv with tha necessary data packages or standards are made from pure materials The stock standards for this method are the following

a Beatek VOA Calibration Mix 4 - Catalog No 30009 2000 mg1 in methanol

b Peatek VOA Calibration Mix 5 - catalog No 30010 2000 mg1 in methanol

c Aquatec 602 Mix (11199102) 500 mgl in methanol d Aquatec GCMS VOA Calibration Mix 3 (061391) 2000

mg1 in methanol a Aquatec Trichlorofluorsma-thane Standard (OS079104)

5000 mg1 in methanol g Restek VOA Internal Mix Catalog No 30011 2500 mg1

in methanol

C Working Standards a 100 mg1 working standard

500 ul Reatek Mix 4 2GCO mg1 SOO ul Restek Mix 5 2000 mg1 2000 ul 602 Mix 500 mg1 SOO ul GCMS Mix 3 2000 mg1 200 ul Trichlorofluoronethane Standard 5000 mg1 6300 ul methanol

b 20 mg1 working standard

2000 ul 100 mg1 working standard 6000 ul methanol

c 5 mg1 working standard

2500 ul 20 mg1 working standard 7500 ml methanol

D standards for calibration are introduced to the analytical system via the thermal desorber to replicate the flow pattern of the sample analytes A known amount of standard is injected onto the front bed of Carbotrap C and thermally desorbed as the samples are performed

50 INSTRUMENT SET-UPj The thermal descrber transfer line is directly connected to the inlet of the purge and trap vessel The helium carrier gas containing the organic analytes is purged through 2 ml of reagent water in order to scrub polar organics such as the methanol used for standards from tha sample The organics are refocused on the LSC-2 trap and thermally desorbed onto the GC column

4 Reviaion 30 Date 080792

Method TO2 __ Page 3 of 7 A Thermal De-iorber

DesorJgt Temp - 400C Desori Time - 5 min Bake Tamp - 400C Bake Time - 5 min

B LSC-2 Purge amp Trap - two millil^tera of reajent watar is transferred in the 5 ml purge vessel

Purge Time - 70 Day Purge Time - 20 Predeaorb Temp -40 Desorb Temp - ISO4

Desorb Time -20 Bake Temp - 220 Bake Time -70

- The trap used consists of 23 Tenax 13 carbosieve S-ZI - The purge and trap transfer line is directly connected to the capillary column

C Varian 3400 Gas Chroznatograph Initial Temp - 40degC Initial Time - 4 min Ramp Rate - 10degmin Final Temp - 200laquoC Final Time raquo 1 min

60 CARTRIDGE PREPARATION Cartridges are prepared by purging ultra high purity helium at a flow of 50mlmm through each tube thermally heated to 400c for 10 minutes After 10 minutes the tube is cooled to room temperature while still connected to the helium gas The tube is removed and stored in a Teflon lined screw glass tube The cartridges must be used within 2 weeks of being baked

Prior to field sampling 5 of the tubes mulaquot be analyzed for blank contamination The batches of tubes are acceptable if there are no analytes of interest greater than lOng

70 INITIAL CALIBRATIONI A Before analysis may begin the ion trap detector must ba

toned using bromofluorobensena (BFB) BFB ia used instead of FC-43 in order to tune the detector the same as in the USSPA Methods 624 and 524 which are purge and trap methods for volatile organic compounds

Revision 30 Dates 080792

Method TO2 _____ __ _____ ______ Page 4 of 7 Bromof luorobenzene (BFB) must meat the following specifications Mass Ton abundance Criteria

50 80-400 percent of mass 95 75 300-660 percent of mass 95 95 base peak 100 percent of naao 95 96 50 - 90 percent of trass 95 (see note) 173 leas than 20 percent of mass 174 174 500 - 1200 percent of mass 9S 175 40 - 90 percent of mass 174 176 930 - 1010 percent cf mass 174 177 50 - 90 percent of mass 176

Note All ion abundances must be normalized to m_ 95 the nominal base peak even though the ion abundance of mz 174 may be up to 120 par cent that of mz 95

B A 5 point curve containing all analytes of interest must be analyzed at the following amounts 10 20 50 200 and 500 ng Using a quadratic equation the correlation coefficient of aach compound used for quantisation must be greater than 0990

c The asymmetry factor should be between 08 and 20 for the following analytes

1 benzene 2 methylene chloride 3- tetrachloroethene

D A Quality Control Check Standard at 30 ng should be analyzed after the 5 point calibration See Table 1 for acceptable recovery limit- The quality control standard ia prepared the same as the standards are prepared

E- Instrument Blank - Before analysis of samples should start an acceptable instrument blank must be acquired An acceptable method blank contains all analyte at leaa than one half the reporting limit

F The initial calibration sequence is as followsj

2 10 ng 3 20 ng 4 50 ng 5 200 ng 6 500 ng 7 8

80 CONTINUING CALIBRATION A The mid-level standard must be analyzed within 12 hours of

the previous standard The response factor must be plusmn 20 of the initial mid-level standard to continue analysis

Revision 30 Date 080792

Method TO2 Pacte 5 of 7 The first 12 hour time period aftar the calibration curve starta at the injection of the 500 ng standard For the following analytical windows the start time of the 12 hour window ia at the injection of the instrument blank prior to the SOng check standard

B Instrument Blanks - Instrument blanks must be analyzed every 10 samples Instrument blank must not have any analytes above one half the reporting limit If an instrument blank fails previous analysis must be reviewed for possible contamination

C The continuing analysis is as followsi 6 500 ng - start time of first analytical 12 hour

window (Note This is the SOOug standard at the end of the calibration)

7 QCS 8 VIBLKM 9-19 samples 19 VIBLK 20-29 samples 30 V1BLK - start of second analytical 12 hour window 31 50no Check Standard - must be analyzed before first

12 hour window ends

90 SAMPLE ANALYSIS Before samples blanks and standards are analyzed they are fortified with surrogate and intarnal standard compounds

Internal Standard Spike amount 14-difluorobenzene 100 ng Chlorobenzene-ds 100 ng Bromochloromethane 100 ng

Surrogate Spike Amount l2-dichloroethane-d4 200 ng

20deg nToluene-daBromofluorobenzane 200 ng

The internal standard recovery should be within 50 to 150 of the average area counts from the five point calibration

The surrogate standard recovery should be 75-125 of the true value

MatrixMatrix Duplicate Analysis - In general samples for matrix and matrix spike analysis will be spike data 100 ng The recovery limits are 75-123 of the true value The reproducibility of the results should be plusmn 25

100 IDENTIFICATION Identification of analytes is performed by comparing retention tines of the standards with the samples Analytes are confirmed by spectral identification

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

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Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 3: METHOD TO2 SitetfOaSTl - semspub.epa.gov

4 Reviaion 30 Date 080792

Method TO2 __ Page 3 of 7 A Thermal De-iorber

DesorJgt Temp - 400C Desori Time - 5 min Bake Tamp - 400C Bake Time - 5 min

B LSC-2 Purge amp Trap - two millil^tera of reajent watar is transferred in the 5 ml purge vessel

Purge Time - 70 Day Purge Time - 20 Predeaorb Temp -40 Desorb Temp - ISO4

Desorb Time -20 Bake Temp - 220 Bake Time -70

- The trap used consists of 23 Tenax 13 carbosieve S-ZI - The purge and trap transfer line is directly connected to the capillary column

C Varian 3400 Gas Chroznatograph Initial Temp - 40degC Initial Time - 4 min Ramp Rate - 10degmin Final Temp - 200laquoC Final Time raquo 1 min

60 CARTRIDGE PREPARATION Cartridges are prepared by purging ultra high purity helium at a flow of 50mlmm through each tube thermally heated to 400c for 10 minutes After 10 minutes the tube is cooled to room temperature while still connected to the helium gas The tube is removed and stored in a Teflon lined screw glass tube The cartridges must be used within 2 weeks of being baked

Prior to field sampling 5 of the tubes mulaquot be analyzed for blank contamination The batches of tubes are acceptable if there are no analytes of interest greater than lOng

70 INITIAL CALIBRATIONI A Before analysis may begin the ion trap detector must ba

toned using bromofluorobensena (BFB) BFB ia used instead of FC-43 in order to tune the detector the same as in the USSPA Methods 624 and 524 which are purge and trap methods for volatile organic compounds

Revision 30 Dates 080792

Method TO2 _____ __ _____ ______ Page 4 of 7 Bromof luorobenzene (BFB) must meat the following specifications Mass Ton abundance Criteria

50 80-400 percent of mass 95 75 300-660 percent of mass 95 95 base peak 100 percent of naao 95 96 50 - 90 percent of trass 95 (see note) 173 leas than 20 percent of mass 174 174 500 - 1200 percent of mass 9S 175 40 - 90 percent of mass 174 176 930 - 1010 percent cf mass 174 177 50 - 90 percent of mass 176

Note All ion abundances must be normalized to m_ 95 the nominal base peak even though the ion abundance of mz 174 may be up to 120 par cent that of mz 95

B A 5 point curve containing all analytes of interest must be analyzed at the following amounts 10 20 50 200 and 500 ng Using a quadratic equation the correlation coefficient of aach compound used for quantisation must be greater than 0990

c The asymmetry factor should be between 08 and 20 for the following analytes

1 benzene 2 methylene chloride 3- tetrachloroethene

D A Quality Control Check Standard at 30 ng should be analyzed after the 5 point calibration See Table 1 for acceptable recovery limit- The quality control standard ia prepared the same as the standards are prepared

E- Instrument Blank - Before analysis of samples should start an acceptable instrument blank must be acquired An acceptable method blank contains all analyte at leaa than one half the reporting limit

F The initial calibration sequence is as followsj

2 10 ng 3 20 ng 4 50 ng 5 200 ng 6 500 ng 7 8

80 CONTINUING CALIBRATION A The mid-level standard must be analyzed within 12 hours of

the previous standard The response factor must be plusmn 20 of the initial mid-level standard to continue analysis

Revision 30 Date 080792

Method TO2 Pacte 5 of 7 The first 12 hour time period aftar the calibration curve starta at the injection of the 500 ng standard For the following analytical windows the start time of the 12 hour window ia at the injection of the instrument blank prior to the SOng check standard

B Instrument Blanks - Instrument blanks must be analyzed every 10 samples Instrument blank must not have any analytes above one half the reporting limit If an instrument blank fails previous analysis must be reviewed for possible contamination

C The continuing analysis is as followsi 6 500 ng - start time of first analytical 12 hour

window (Note This is the SOOug standard at the end of the calibration)

7 QCS 8 VIBLKM 9-19 samples 19 VIBLK 20-29 samples 30 V1BLK - start of second analytical 12 hour window 31 50no Check Standard - must be analyzed before first

12 hour window ends

90 SAMPLE ANALYSIS Before samples blanks and standards are analyzed they are fortified with surrogate and intarnal standard compounds

Internal Standard Spike amount 14-difluorobenzene 100 ng Chlorobenzene-ds 100 ng Bromochloromethane 100 ng

Surrogate Spike Amount l2-dichloroethane-d4 200 ng

20deg nToluene-daBromofluorobenzane 200 ng

The internal standard recovery should be within 50 to 150 of the average area counts from the five point calibration

The surrogate standard recovery should be 75-125 of the true value

MatrixMatrix Duplicate Analysis - In general samples for matrix and matrix spike analysis will be spike data 100 ng The recovery limits are 75-123 of the true value The reproducibility of the results should be plusmn 25

100 IDENTIFICATION Identification of analytes is performed by comparing retention tines of the standards with the samples Analytes are confirmed by spectral identification

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 4: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Revision 30 Dates 080792

Method TO2 _____ __ _____ ______ Page 4 of 7 Bromof luorobenzene (BFB) must meat the following specifications Mass Ton abundance Criteria

50 80-400 percent of mass 95 75 300-660 percent of mass 95 95 base peak 100 percent of naao 95 96 50 - 90 percent of trass 95 (see note) 173 leas than 20 percent of mass 174 174 500 - 1200 percent of mass 9S 175 40 - 90 percent of mass 174 176 930 - 1010 percent cf mass 174 177 50 - 90 percent of mass 176

Note All ion abundances must be normalized to m_ 95 the nominal base peak even though the ion abundance of mz 174 may be up to 120 par cent that of mz 95

B A 5 point curve containing all analytes of interest must be analyzed at the following amounts 10 20 50 200 and 500 ng Using a quadratic equation the correlation coefficient of aach compound used for quantisation must be greater than 0990

c The asymmetry factor should be between 08 and 20 for the following analytes

1 benzene 2 methylene chloride 3- tetrachloroethene

D A Quality Control Check Standard at 30 ng should be analyzed after the 5 point calibration See Table 1 for acceptable recovery limit- The quality control standard ia prepared the same as the standards are prepared

E- Instrument Blank - Before analysis of samples should start an acceptable instrument blank must be acquired An acceptable method blank contains all analyte at leaa than one half the reporting limit

F The initial calibration sequence is as followsj

2 10 ng 3 20 ng 4 50 ng 5 200 ng 6 500 ng 7 8

80 CONTINUING CALIBRATION A The mid-level standard must be analyzed within 12 hours of

the previous standard The response factor must be plusmn 20 of the initial mid-level standard to continue analysis

Revision 30 Date 080792

Method TO2 Pacte 5 of 7 The first 12 hour time period aftar the calibration curve starta at the injection of the 500 ng standard For the following analytical windows the start time of the 12 hour window ia at the injection of the instrument blank prior to the SOng check standard

B Instrument Blanks - Instrument blanks must be analyzed every 10 samples Instrument blank must not have any analytes above one half the reporting limit If an instrument blank fails previous analysis must be reviewed for possible contamination

C The continuing analysis is as followsi 6 500 ng - start time of first analytical 12 hour

window (Note This is the SOOug standard at the end of the calibration)

7 QCS 8 VIBLKM 9-19 samples 19 VIBLK 20-29 samples 30 V1BLK - start of second analytical 12 hour window 31 50no Check Standard - must be analyzed before first

12 hour window ends

90 SAMPLE ANALYSIS Before samples blanks and standards are analyzed they are fortified with surrogate and intarnal standard compounds

Internal Standard Spike amount 14-difluorobenzene 100 ng Chlorobenzene-ds 100 ng Bromochloromethane 100 ng

Surrogate Spike Amount l2-dichloroethane-d4 200 ng

20deg nToluene-daBromofluorobenzane 200 ng

The internal standard recovery should be within 50 to 150 of the average area counts from the five point calibration

The surrogate standard recovery should be 75-125 of the true value

MatrixMatrix Duplicate Analysis - In general samples for matrix and matrix spike analysis will be spike data 100 ng The recovery limits are 75-123 of the true value The reproducibility of the results should be plusmn 25

100 IDENTIFICATION Identification of analytes is performed by comparing retention tines of the standards with the samples Analytes are confirmed by spectral identification

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 5: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Revision 30 Date 080792

Method TO2 Pacte 5 of 7 The first 12 hour time period aftar the calibration curve starta at the injection of the 500 ng standard For the following analytical windows the start time of the 12 hour window ia at the injection of the instrument blank prior to the SOng check standard

B Instrument Blanks - Instrument blanks must be analyzed every 10 samples Instrument blank must not have any analytes above one half the reporting limit If an instrument blank fails previous analysis must be reviewed for possible contamination

C The continuing analysis is as followsi 6 500 ng - start time of first analytical 12 hour

window (Note This is the SOOug standard at the end of the calibration)

7 QCS 8 VIBLKM 9-19 samples 19 VIBLK 20-29 samples 30 V1BLK - start of second analytical 12 hour window 31 50no Check Standard - must be analyzed before first

12 hour window ends

90 SAMPLE ANALYSIS Before samples blanks and standards are analyzed they are fortified with surrogate and intarnal standard compounds

Internal Standard Spike amount 14-difluorobenzene 100 ng Chlorobenzene-ds 100 ng Bromochloromethane 100 ng

Surrogate Spike Amount l2-dichloroethane-d4 200 ng

20deg nToluene-daBromofluorobenzane 200 ng

The internal standard recovery should be within 50 to 150 of the average area counts from the five point calibration

The surrogate standard recovery should be 75-125 of the true value

MatrixMatrix Duplicate Analysis - In general samples for matrix and matrix spike analysis will be spike data 100 ng The recovery limits are 75-123 of the true value The reproducibility of the results should be plusmn 25

100 IDENTIFICATION Identification of analytes is performed by comparing retention tines of the standards with the samples Analytes are confirmed by spectral identification

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 6: METHOD TO2 SitetfOaSTl - semspub.epa.gov

4

m Revision 30

Date 080792 Method TO2 ___ ___ Page 6 of 7

110 QUANTIZATION Sample results will be reported in ngtuba or ppb vv depending on information received with the tubea The calculation for reporting the result in ppb (vv) ia

no x 1 ug x 1 umola x 244-5 ulfai at 1 atm 25C tube 1QOQ ng mw 1 umola

L(a) sampled at 1 atffl 2SC X ml_ _ tube 1000 L(g)

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 7: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Method TO2

Table 1 Target Compound List

Reporting Limit

compour notuba

Chloromethane 10 Bromomethana 10 Vinyl chloride 10 Chloroethane 10 Methylene chloride 10 Trichlorofluoromethana 10 11-Dichloroethene 10 ll-Dichlorolaquothane 10 trans-l2-0ichloroethene 10 cis-lf 2-Oichloroetheno 10 1 2-Dichloroethana 10 11 1-Trichloroethane 10 Carbon tetrachloride 10 Bromodichloromethane 10 12-Dichloropropane 10 cia-1 3-Dichloropropene 10 Trichloroethene 10 Dibrornochloromehtane 10 112-Trlchlorc ethane 10 Benzene 10 trana-1 3-Dichloropropene 10 Bromoform 10 1122-Tetrachloroethane 10 Tetrachloroethene 10 Toluene 10 chlorobenzene 10 Sthylbenz0nlaquo 10 Styren 10 12-Dichlorobenzene 10 13-Dichlorobenzene 10 14-Dichlorobenzane 10 Total Xylanes 10

Revision 30 Date 080792 Paqe J of 7

QCS Recovery Limits

60-141 59-142 69-132 77-123 78-123 67-134 63-137 84-116 64-136 60-120 72-129 71-129 69-132 76-124 74-126 64-136 77-123 66-135 79-122 77-123 64-136 74-127 49151 70-130 78-123 80120 63-137 60-120 66-132 72-128 70-130 60-120

Note QCS limits are derived from USEPA methods 601602

92902002JUL92

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 8: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Thermal Tekmar Varian Finnigan Data Oesorber LSC-2 34OO GC Ion Trap Acquisition

Purge amp Trap (ITS40)

Figure 1 CCMS Analysis System The saaple tube is thermally baked at 4OOdegC The organic compounds are transferred using helium carrier gas and refocused on the Tekroar LSC-2 absorbent trap This trap is then heated and the organic compounds are transferred to the gas chroaatagraphic column and detected by the Ion Trap

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

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ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 9: METHOD TO2 SitetfOaSTl - semspub.epa.gov

APPENDIX A

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 10: METHOD TO2 SitetfOaSTl - semspub.epa.gov

A RQHM AND HAAO COMPANY

Carbotrap11 mdash an Excellent Adsorbent for Sampling Many Airborne Contaminants

Carbotrap high purity graphitlzed carbon black can adshysorb then release a wide ranga of aibcms- crganic conshytaminants A Class I adsorbent (1) it has ro surface ions or active (functional) groups The entire surfaceis available for intsractons that depend solely on dispeSicn (London) forces (2) In contrast two other widely used adsorbents Tenax GC and Amberiite XAD-2 resins iave localized surface charges for specific adsorbenladssrbate interacshytions Furthermore Carbotrap adsorbent is more hydrophobic in nature than either cf the resins Thus its pershyformance is unaffected by humicity Carbcrrap adsorbed is Free of contaminants and is net susceptible to solvent Degradation

WQ evaluated Carbotrap adsorbent for a -borne organic compounds using procedures that paraiie work describshyed by the US Environmental Prelection Agency (3) We inshytroduced a known challenge concentration of adsorbate onto a Carborap bed then passed air through the bed The specific retention or breampkihrcugh vciurre (Vtg) of air needed to eiute the adscrbate was determined The larger tnis value the better the adscrbate was retained

Carbotrap adsorbent traps and releases a wider range of airborne organic compounds than Tenax GC or XAD-2 resins

To determine Carbctrsp adsorbents functional trapping range ((he range of molecular ses that can be trapped sucshycessfully then desorbed) we used 38 compounds rangshying from C2 to C1 4 straight chain and ring compounds To characterize the nonspecific surface properties of Carbotrap adsorbent acsorbatos with diverse functional groups were chosen We established the lower end of the functional range by setting iQ liter as the lowest acceptable breakshythrough volume The upper end of the range was determinshyed by evaluating the Cabotrap adsorbents ability to release large moifecules (eg PAHs or pesticides through thermal dcsorption A 20 minute migration time and 350degC temperature were considered the maximum allowable conshyditions for proper thermal desorpton

Carbotrap adsorbents functional range for the comshypounds studied s indicated in Table 1 Extemoly large samshypi 9 volumes can be used with adsorbatas larger than nshydecane and n-butylbenzone

As a comparison the lower end of the functional range for Amberlite XAD-2 resin is similar to that for Carbotrap adshy

i

GC Bulletin 846B

sorbenr Sjt the upper linrit is restricted by Amoerlite XAD-2 resins lirritec ability to withstand certain solvents and temperatures above 15CdegC The lower Unit or Tenax GC appears TO so a linear C8 backbone or equivaent struc-

Tacle i ~ Breakthrough Volumes for 0-ganic Adsorbaies on Carbot-ap Adsorbent

Adsorfca 3

Acetic sc

112-TrjwoG n-Byiar^ li2-T-ric-rQinare

Phenol Toliier=

4Hepi-anone V-Oic-icre n-Ccts-a

Vtg 20 C (mlg) orrei Coef

1 OOCOO 5J9 x 10 03Slt112 i06 x 10raquo OS9S75 4 93 x lt OS9219 7 6x CJ

0 9S690 166x101 C38410 194 x 10 093349 376x10^ 093611 589 x 103 099994 652 x 10 ogasso117x10 099302 127 x 10laquo 039939 192 x 10 09S613 247 x 10 099986 799 x 10 093371 431 x 0 097190 616 x 10laquo C99941 650 x 10 09S972 158 x 10 030999 204 x 10laquo 0 99581 208 x 10laquo 099935 244 x 10raquo 023991 134 x 10 099925 181 x 10 0999S9 203 x 10T 099969 206 x 10 099548 223 x 0 093990 427 x 1C 099963 840 x 1C 09S971

-172 X1praquo 099993 099971 099937 099999

700x10 J bull099989 lti laquolaquobullbullbullbull- ogsSKS131 x 1C1 099983 832 x 10 09(5309

bullv5 vlaquoKijr rgn bo-Ing sdiorbsies muS 6i ficanrnac at devaicd lamporaiuiBS ihlaquon cjcjiiicc lor 20degC (by unoa icicesion) 1st wipyson Thlaquolaquoraquo icmpshylaquoratuCt-laquosVigt3U3h voKJir coreUUon C08flicwr3 show ragrsjsicn plot JiCd n

DFwrS3ril targ or Cvcxxn

rraquoi im to dwweoo raquot hiclaquo l

ALL WCMTS nCSSRVEO

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 11: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Figure A mdash The Entire Surface of Carbotrap Adsorbent is Available for AdsorbentAcisorbate Interactions

A1 mdash Surfaca Model for Carbotrap Adsorbent (Surfaci Area ^ 100mraquog) Charges srlaquo uniformly distributed around irto carton atom camera

A2 mdash Surface Model for Tenax GC Resin (Surface Area mdash ZSSmg) Surfaca is nonuniform in chargo mdash charge is localized lo oxygen atoms

nunits

A3 mdash Surface Model tor Amblaquoriila XAD-2 Resin (Surface Araa 364mvg) Surface is nonunifcrm in charge and is lass polar lhan Tenax GC

-CHj-CH-CH-CH-CH-CHshy

CH-CH- CH-CH-CH4-CH

Fijarc Al adipid from M flaarw A2 ind A gtrlaquont (1)

cure (e g iutanoic acid C-C-C-C-0-C) For Tenax GO as for Arrb9re XAC-2 aesorption of tergsr molecules (and cf certir r cecules within the functorsi -arise) is restricted by scisn and temperature effects

Ws jsec acserbates representing sigh classes of comshypouncs G iqmpsre the adsorptive properties of the Carboshytrap an - nr ard Amtsrlite XAO-2adsorbents Carboshytrap adsorcent shews greater adscrbng cacacty for linear and ccic Totecuss (i abis 2) This rssjilsfrcm its unique surface area properties (area IGOmg density 038gml) and CriccrJized suTace cnarge a combination that permits greate- ntc-ractlon betveen the adsorbent surface and the adscroate Tenax GC adsorbents greater adsorbing power for rioens-cic acd is due to localized surface charges specpoundc fc interactions with acd groups (Figure A)

Frcn the breaKnrcugh vciurra vig two other values can be Giicu itad to characterize ihe adsorbentadsorbate relaticnshp The adsorption coeffic ent Ka describes the dislricjtic of the adsoroate betveen the gas and solid phases re ating the retention volume to the adsorbent surshyface area The equirbrium sorplion capacity Qg describes the aasorteni3 capacity for the adsorbate Large values of Ka aic Og indicate good retention characteristics The large Gg values for Carbctrap adsorbent in Tabie 2 reflect the acliy d the ertre surface to particioate in the interaction (Figu3 A Ag vaiuas can also be used to predict he reiashytionsrip between the adsorbent and untested adsorbates in the sa~8 chemical class as a tested acsoroate

You can completely recover adsorbed compounds from Carbotrap adsorbent by either solvent or thermal desorption

Acscrbatas wc-e recovered from Carbctrap adsorbent tubes by ooth solvent and thermal desorption techniques Our previous studios showed 1-butanol 2-butanone and 2-ethcxyeilylacetrte wera difficult to desorb from some adshysorbervs The elecron-i-ch oxygen atoms i hese molecules form c^vient bonds with metal and sait mpurities on an adsorber s surface These adsorbatc-s tren are a stringent test of adsorbent surface purity The active groups on cnlorobe-zene (haiogen) n-pemanolc acid (carboxyl) and bentiam ne (ammo) similarly reveal specific localized charges en an adsorbent surface Adscrbate volumes in Tab- 3 rspreseni the quantity of adsorbats in 50 liters of air a 05 times the Occupational Safety and Health Ad-minampatfcns threshold iimif value (TLVlaquo) Whci a TLV was not avaiiabs 1C|i was used

Per actvatad charcoal 60 recovery of 1-buianol and 2-ethoxyethylace3te is typically cited as an acceptable value Per Carbctrap adsorbent recovery of these and other con-pcurds is virtually complete by both methods of descrpticn (Table 3) This is due to the high purity of the sorbent and the nonspecific nature of its graphitized surface

Two absorbing solvents were used in this evaluation (Tabie 3) Carbon disulfide was chosen because it is comshyrroniy used as a desorbing solvent for charcoal Also its high heat of adsorption allows it to readty displace adsorbed compounds Carbon disulfide cannor be usad with polymaric adsorbents such as Tenax GC and Amberlite XAC-2 because it degrades them Thus you are forced to usa other solvent that may not remove the adsorbates efshyfectively The other solvent acetonitrile is often used in IIshyquic chromatcgraphic analyses

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 12: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Table 2 mdash Breakthrough Volumes (Vg) Adsorption Coefficients iKaJ and Equilibrium Sorption Capacity (QQ) Values for CarboTrap Tanax GO ard Amberlit- XAD-2 Adsorbents

v^aoca Go aCarboirap Tanax GC XAC-2 Carbcirap Tanax GC XAC-2 Carsotrap Tenax GC XAC-2

n-Oecais 4 79x10 156x10 333 lt 10- 280 361 x 10- 340 x 0J 230 9Ux0 212x10 Ssrzyaniie 223 10r 357 x 10laquo 1 S3 x 1C 121 x 1C 323 - 1Cr 242 x-C3 331x10 157X1C 7 13x10 Crtiorobenze-e 153 x 10 151 x 1Q5 434 x 10 355 x 1C 349 iOJ 7 20 x iff4

730 x 1C1 835 x 10 224 x1C3

3-Xylene 42ltJ x 107 353 x 1C 735 x 10 230 x 102 a39 lt 10 i-iax 10- 1S2 x 10 166 x 1C1 340 x 10 p-Cesoi 206 x 1C7 I SOx 10 493 x 10 111 x 1C1 3laquo00c 723x10 314 x 10 370 x 1C1 221 x 10 n-P2anoc aca 431 x 10 973 x 1Claquo 101 x 1C 234 laquo 1Clt 223 lt 0 151 x 10 178 x 101 399 x 10 431 x 10J

Cyclstoxanone 204 xiOlaquo 106x10 627x10 110xlOJ 245 lt lO- 545 x 10s al9xia3 428 x 10 147xlC3

2-Vcnyl-2-Drap33l 652 x 103 656 x 1C5 542 x 1C3 353 x 1C5 139lt-CC 306 x O- 193 x 1C5 209x10- 165 x 10

bullFor ttllaquo Ihrao adsgrbsftls correlation coefficients c- cralkLVougn velum and igmpsrature rinsed Irem 097190 o 100000

Table 3 mdash Desorption Efficiency cr Carbotrap Carbotrap 100 Thermal Desorption Tubes Adsorbent by Solvent and Thermal Desorption

Desorpticn Efficiency ) bull Solvent Ooso-ption

Carbon Thsrmal Adscrbale Volume Ac9lonilra Csulfida Desorption Toijsie 22u 102 - 111 2-3uianonlaquo VSiii 105 109 1C5 l-Bua-iol 09ul 1C6 102 113 2-Eri3xyelrylsot3le 1 1 104 102 1C3 n-Decane iOu1 130 - 111 ChoroDonzene fiyc 93 - 113 Storage eontainar includid with tubedn-Pcntaicic ac 13ii 11C 103 111 Senzylamina 1 On 1C8 109

Thermal Thermal desorpion has now gained acceptance because Desorpion

Uril Tube Specifications Cat No of more demanding regulations from the US Environmenshytal Prot3Ction Agency the National Institute for Occupational Supeco glass 6mm 00 x bull Safety and Health arc other agencies When recovered 4mm ID x 115cm long 2-0238 by solvent desorpfon a trapped adsorb=te is diluted In conshy Tekrrar2 stainless steel trast when a suitaampie adsorbent is heated- adsobatcs 14 OD x 7 long 2-0241 are released effectively and undiluted Thus with Inermal 58 OD x 7 long 2-0239 desorption you can monitor small amounts cf airborne con-

CCS stainless steel taminants that wcud otherwise be uroeiectabio 14 OD x 3 long 2-0240 Tenax GC resin re-leBsestouene benzene and trichloroshy

eihylene residues during thermal desc-ption Residues are evoived from Amoerlite XAD-2 resin a 150degC At 250degC OREO-100 Solvent Desorption Tubes 2-0255 the resin will competely pyrolyza Thus Amberlite XAD-2 (pack of 25) is poorly suited lo thermal desorpticn and Tenax GC must

Carbotrap adsorbent (2040 mesh) 5g 2-0287 be carefully conditioned to prevent artifact formation Carboshytrap adsorbent in contrast is stable at temperatures of

Cor ciscripons ol additional Caootrap insrmal flsso-pucn tubt and (no 400degC or higher Supcito Thermal Oesorption UrMt plsia rlaquoftr to our Eaalog Although Carbotrap adsorbent once came with wide par-

tide size distribution we now offer the uniform sized large particla material (2040 mesh) This further reduces back Kissltv AV and YI Yashh Gis Aosofpan C^rO^bullalC5^a 1y Priwa

Nlaquo Yc-k or) H-3(1S5S) pressure 2 Ai~ rs FV P-iyjieal duvn-xry (Jrd ilt3 ) WH Pccnun i C= Sfi Carbotrap adsorbent is available in 7mm OD x 5mm ID (1i3J)

x 10cm long ORBO1-100 solvent desorption tubes 3 Cr-arsc -ira or of Scrttrl lttem or Use m Airborrc E virorrrtiral Si-OI ng US CA Ooe-nflri So 500T-rsOpoundltl (1978) (350mg175mg bed weights) or in tubes for three widely t W-ac K5ni irfl 0laquo ruifiinteril st CcillaquoClaquo Charliiir (ana Ed ) Kar per

used thermal desorption units It also comes in bulk Of bullrd aovraquo f9S9)

course we can prepare custom Carbotrap tubes to your Rofersnctt 131 Sv3i1laquobraquo tcm Suprtco specifications For information about thermal desorption or detais on custom Carbotrap tubes cai1 our Technical Servshyice Department

^Strong pcar andor ionc groups on ar adMfSlaquonl r^acn can cause dlswscdashylion or an adsorbata or of in adsorbent9 surface bonds forming titilacts

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

vs-21on

BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 13: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Supelcotrade Thermal Desorption Unit

If your analyses involve Industrial Hygiene Ambient Air Monitoring Indoor Air Pollution Sampling Hazardous Wast Sites Water Pollution Samples Alcoholic Beverages Petroleum Plastics

tha Supelco Thermal Dasorpticn Unit offers you the most value at the lowest price

Accurate ballistic heating mdash Samples are delivered rapidly tc trie analytical column for sharp symmetrical peaks Cooldown time is lt2 minutes via a rtign speed fan

Temceratures attained 3CdegC -bullraquo 400 plusmn4aC in 26 plusmn2 ssconc3 30 =C - 300plusmn i degCin20 plusmn2 seconds 30eC -raquobull 200 plusmn1degC in 16 plusmn2 seconds 30=C -bull 100 plusmn1degC in 12 plusmn2 seconds

Temperature programming capability mdash Program atvariable rates for thermal fractionation of contaminants resicuepyrolyss analyses of polymers etc

Exclusive sample saving device mdash A softer and a secondary adsorbent trap saves you 0 tc 93 of the sample for a second analysis The splitter incorporates a shjt-off valve and a fire metering valve

Accepts reusable Carboirap thermal dssorption tubes mdashFor long term economy

Secondary rapwater removal port mdash Aceserate water migration through the adsorbent bed by applying minimal heat to the adsorbent tube This protects the analytical column from water damage while higher boiling ccmpouncs rsmsin on the adsorbent Or place a secondary trap in the port to collect materials from the primary chamber during ballistic or temperature programmed desorption

Heated nickel transfer line mdash Prevents sample adsorption or condensation during transfer to a glass or msta packed colshyumn narrow bora (025 -032mm iD) capillary column or wide bore (05+ mm lO) capillary ccUmn Each transfer line is custom prepared (or the GC system it wi be used with (Fussd silica transfer line available upon request)

Electronics interface with the GC mdash YOU can automatically start tne analytical and integrating systems

2-2895 Supeico Thermal Desorption Unit (110 VAC)

For eO-er -5Sjci rTj sr s CST iff] piar seecirncs CClaquoI rai

Trademark

Supdcc mdash 3jraquo^0 C Timii- mdash TsltrarCc Traquontr mdash E- ltraquo Rssair gt-bullbull-raquo Ar- TLV mdashCti3al S=cly iV^ rlaquo

O sx a-aieno Supeco

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BUPBL60 INS bull Swpa coPort laquo 8sl (fond Pw 16623-00^3 USA bull Fhoni pound914] saa-ail en-ailt4 3IS-3^it bull vvx 3u e33bull rAX 8143S9-3Qlaquo14 BjraquonicaaAlaquoC^cmiriduLavaiion2 1ia8Gji St5srttnd bull Phortlaquo022 C43S Slt bull r-ieiis =27 Axi3J 1S 17 bullUPCUGO CANADA LedLraquoilaquo bull 46-820 Wtiircfl Bcsi bull Oaicvill Onurlo Conraquo-laquo L6K3Vi raquor-ont i^-jj 3laquoli-52n - ~M bulllaquo H^lshy

M3deB99 raquoS39raquoS3900 0laquo0laquoaa Hotr6j-Hotr6j-ss bullbull ^cr^crlaquolaquo C3SC3S abCabC55 bull T^ Si7-laquoi bull PAXOB17aj 6303bullUPBUCO OlaquoUTraquoCHLANO OfttiH bull Kaislaquor-Fridrilaquoh-PfomM3deB bullutraquoCUCO FRANCE Bi-r-l bull 19rui JeM) Mir-not 70100 St-Oc--mlaquoln-tn-LoySt-Oc--mlaquoln-tn-Loyeebullbull PiriPirill rarrar~~bull -none i J jr 5 i -5 aII^93cG bull PAX [1 )3G 75 B2 G3

i bull MinlaquotO-ku Toky Jntn1Q3 bull Pnlaquo C 2 53-3-Cn bull T 252r bull PAX [03] 53Q-1^S3 jbullUPeuco JAPAN LTD bulllaquoraquobull 8uiW-gt9 bull 1-6-1 bull

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 14: METHOD TO2 SitetfOaSTl - semspub.epa.gov

SUPELCO AND IAAB COMPAIMV

Efficiently Monitor Toxic Airborne Compounds by Thermal Desorption

laquobull bull

GC Bulletin 849A

Describee in the Compendium of Methods for ths Determination of Toxic Organic Compounds in Ambient Air are US Environmental Prelection Agency methods or monitoring volaile and semivolats organic compounds in air samples (1) Eacn of lha f-rst three methods cars for a different sampling tecnniaue followed by thermal desorpshytion to a capidary GC column for analysis

In Method TO-1 compounds ars [rapped or a porous polymer adsorbshyent transferred to a cold trap _and descrbed to the column In Method TO-2 they are trapped on a carbon molecular sieve adsorbent transferred to a cold trap and descrbed to the colshyumn In Method TO-3 they are trappes on a cold trap and deso-fced to ths column

To perform all thrse methods you need two deferent adsorbs it traps mdash plus a ccld trap mdash to obain your samples Even if you follow ony one of these methods you need a highly effishycient system for trapping dssorcins and anaiyzng your sampes

We recommend a reusable Csrshybotrap7 300 thermal desorption tube a Supelco Thermal Desorption Unit and either a SUPELCOWAX 10 capilary column or a Carbopack packeq cc-umn This system ensures high afficiency for trapping transferring and analyzing samples for each of ffe above mentioned methods

This three component system enshysures excelsnc analyses for TO-1 TO-2 or TO-3 toxic compounds A Carbotrap 300 multi-bed tube (Figure A) efficientshyly adsorbs and releases all compounds listed in these methods mdash even when they are present in complex mixtures The back bod Carbosieve S-lll carshybon molecular sieve traps vinyl chloride and other light compounds The midcle bed (Carbotrap graphitized carbon

black) traps the C5-C8 ccmccjrds The front bed (Carcolrap C grabhiiized carshybon baclt) traps ths hexes corn-pounds (Taoie 1) Desov-iar for all compounds s nearly 100C3 (Tabs 2)

Our Supelco Thermal Cesorpucn Unit (Fgjrs B) efficiently and rapidly transfers the adsorbed compounds from the Carbolrap 300 tube to IhaGC column The unit dasorbs the com-

Pguro A mdash Carbclra 330 TJClaquoS Trap a Wide Ranga of Ai-bowa Ccrnpounds

CaDolrap C jrapritized

bullir30r black Carbotrap grjpfiititod CartOJieva S-III

carbon blade molecular silaquovo Itraps C5-C8 (imps light

coripounds) compound) compound])

Direction I jgspampampClssaBa iGlass WC01

Tabla 1 mdash Breakthrough Vslumas (ii Liters) for US EPA TO-1 Hydrocarbons on a Camprbotrap 300 Thermal Oesorption Tube

Hydrocarbon Ca-20Jilaquovingt S-lli

Vinyl Civaride 158 Cfilcrcform 1 2-Dicilooeiiinc 111-Trichloroelhant Caraun teiracnioridt l2-0iciloropropan8

TfichiofotUiy11 Brcmoform Tatraehicroainylenlt Chlorsbampnzfni n-Heptant 1-Hcpeni Benraquort Toluene Elhylbenzen p-Xylene m-Xyina 0-Xylnt Cumtn

Cirbotrap Carborjp C

11 01 27 47 raquo 68 2S 17 2^

318 262 264 bull

23 130

129 112 no no 27S

TlMegtticilvaiulaquo ulcuhtM fmr prdcLvlt modlaquolt isublijSwSlOfn-ipPng volumn

Inc ALL RGHT3

I

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 15: METHOD TO2 SitetfOaSTl - semspub.epa.gov

pcunc-s baliisicaly racing the lubetemperature from 35Co33CdegC in 16seconds All valves and tubing in theunit are ine-t The transfer line betweentne tube and column is heatedeliminating coid spots where anaiyescould condense As a result samplesa r e sharply focused a t t h e coumn inlerand the compounds can be eiicentyseparated Peaks era symmetrical enshysuring accurate qualitative and quanshytitative analyses without a coid trap

To calibrate the thermal descrpticn unit or evauae descrpticn ec ency of the adsorbent lube you can inject conshytrol samples into hs units injection port These are delivered cnto the GCcolshyumn through the same pathway that doscrbsd sampss fciiow Furthermore you cai use Iho unit with either cspilary cr packed cpijmns (This is important because coin column types are reecshyed to perform a complete arslyss of (he TO-1 ccrnccunds)

Choose a 075mm ID SUFSLCOWAX 10 capillary column or one or two Carshybopack packed columns to efsclively refocijs ise thcrrrally cesorcec comshypounds then rssolve them as symshymetrical peaks The wide bcre capillary

Tabls 2 mdash Toxic Compounds Efficiently Desorbed from Carbotrap 300 Tubes

4mm ID Tube lo GC Column DesorptionEflicioncy

Alt2scrbac Rel Sid 0laquov ( Bc-nzena 100 +55 SrcToorm 100 s21 Carbon ielacrcride 99 plusmn35 Chiornfcanzsna 100 plusmn07 Ciiiorofcrm 94 plusmn52 3-Cnicropropere 100 plusmn32 Ccnrens 99 plusmn36 i2-DicpcfC8ihae 102 plusmn41 1l-Dcnorc3tpy(-i3 101 plusmn08 Okjllororrelrane 98 plusmn10 Enybanzsne ICO plusmn30 n-Heptane 99 plusmn42 1-Hepeie 59 plusmn47 Teiraciiicroethylene 93 plusmn29 Tolucre 99 plusmn42 lii-TrichicroeLhare 100 plusmn30 Trichiorooliysi3 101 S26 Vinyl choride 101 plusmn25 o-Xyienc 99 plusmn36 m-Xylena 100 plusmn38 p-Xyieno S9 =36 4mm ID Tube to 2mm ID Tube to Column

DesorpiionEfficiency

AdsorbDe plusmn Rel Sid Oev () Acryloiitriie 100 plusmn06 S-Chioropropene 101 X21 11-Oichicroethylene 99 plusmn17 Moihylene chloride 101 plusmn15 Vinyl chloride S9 S15

bullMean lor Ihrao

column accepts samples win a wide tested Caric^c-- P=^Cb ^degiae^ range of component ccncentaicns(ltl ihebesta-aysosoi^e iQ-i iL-2and -Q gtlo000ng on-cciumn) t cat be 70-3 co-rcc^ncis vie rrgn surface used with the sameinjection flow con- area of h= CaJt-c-sck graprvuzed carshy trol and detection equipment as pack- bsr baclt pac- rs ensures excslent ed columns1 Of all the packings wa recc-jsirg cscab y

bull bull bull bull raquo bull bull bull - _ bdquo _

^ Rgurs 8 mdash Compieta Systum fcr Trapping artc Anayzr-s TO- TC-2 ard TO-3 Compounds

s^eca

Oescrpcn

Cirfaocnp300 Tubs

YourChromitograph

Columni lo

0 5mm O

OA

Oft CirblaquopKgt9lS

SP- 1 CCO p

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 16: METHOD TO2 SitetfOaSTl - semspub.epa.gov

If yof 3amppoundS contain all of me sign-tear TO-1 compounds use a SUP2 CCWAX 10 WCG acre caollary

k C01 (Fg^re C)

Two csirs of nonnaicg^atid hydroshycarcc-s (n-hoptane and tciu^na oshyxyan3 ara camera) coeds from the packed uclvvn The capJIary column resclvgs ihsss ccmpojras Similarly wo pairs of criorina-e hydrocarbons (carbon teirac^oriae arp 111-tr i shyenorcehara choOiorn and tetrashyChlorcchyl3ne) coeus frcri ins capNa column but are rsscived on the packed coiumn

enrr 2 G7=rm ID SLPELCCWAX 0 cciurr cr a Caicopack 8ic SP- iCCC packed cclumn provices exshycslsnt separa^^ anc snarp peaks for (he TC-2 anc 0-2 conpOycs (Figure D Whn tsing ihe capliary coijrrr ycj car oban iha sr-)esr vn cnlcCe peak oy trapping he samp- on a 4nr- ID Carborap 2CO tublt transferring t o a 2mm ID JLOE IPer descrpng ii o is capillary ccumn (rgurs D) Tne Supslco Trsm Ccscptcn Uiii makes this transJer easy Sin-py ptjf ie 2mm O tubs in the exciusve sarnpe saver chamber and quariisively trarssr the sample rom ths 4mm ID tube (Tabe 2) Wish tl3 packed column tna vinyl chiorids pepoundilt

1w be sharp from the 4mm tube ard [his tSsfer prccsdure is unnecessary

If you are folowirg ail trree me-hccs you can use a Caroopack BM-c Sr-1000 coiurnn (or ihc TO-1 comshypouncs as well as or ihe TO-2 and TO-3 compoj-icia Analysis time for the TO-i compcjncjs will bo a itiie longs en a Carbo^ack C01 SF-iCCO ccishyumn t- the Scmpes wll bo resoivsd well

yve aso crepa-e standards to heo you perform these analyses Toxic Crganics Mx TO-1 A contains 2mg of each compound in the capllay chromatogram n Fig-^s C in methanoi TOXC Crganics Mix TO-19 contairs 2rg of each oi the olhar compounds in FiguG C plus ally chloric acryioniirie brcmobenzene 13-oishy

are and ethylens oibromice

Figura C mdash Csmplcta Analysis of Ther-aily Oeserbcd TC-i hcrccarbona

Aiyt csl Conijivori mdash SC-lOO Cd-iC- C0ltb S=-JCC 5 x 13 S3 Co Ti 35=C 3r 2 min raquogtCR 1C 520C 31 lSC^gt FUw Rll3 (raquo-r n iosorp Vjlie 3 eciyr) 20-MTr ltgt raquo FO (a x 0 ArS) SJ^pla 2ig sad campcncnt

3JPELCOVAX 10 50-H lt 075-rrt 3 - m Mr-) Cl Tct^ 3=4C br 4 -n - i c 5iOraquoC 31 30Crri n Flow Riie ltimT iC CSSOT -JSt 1C ur- lOiT m-v Ha Vjys-up OAJ iOiriv Vj Del FlO (30 x 0 AFS) Samols 02iig MJ^- jrpon--il

ns -ins Tom 220=C

P-3 Lo 0 mdash T-e-rriy OeSirDsd TO-2 and TObull3 CcTit cjncs -

Capiiary Column Packed Column 5 ABfBv i fi 1-CiC wolaquofvne

5 5-C-C=pOainlaquo 1 S Cioiglsm 7 Z-OiN^rscii-f

1 -LI-TrisMsrstlMrH gto gt gt3|S i C5oneiricr5fltlaquo 1 l

^0 2k-ni 1 11 1 -Vjcniarciicyitiu

i2 H-jivraquo

1 1 3 n =rotlt-ci

lj i i raquo

i i j

1

I 1

Il

1

i 1J

8 I n

bull3 1 1

I

i1o

1 a

IV__ 1 raquo bull

Ub 9

bull 5 i raquo i

OuijU10 12 U ii

U tl A

^-^^ - 1 i lt i i

15 22 22 0 2 i

4

u

1

ji 1 ^L

S 1

11 l 1 i f

v bull ^ bull( Vmdash n_t^H

10 11 14

-1shy

IB 1gt Mut Mm

Analylical Ccnsuions mdash SCSO Ca-olc^ Blo SP-IOCO 8 lt 1raquo S3 Sarpraquo 1-fl3 9JCl corrpo-rcnl ccnflishyliors sraquo~i as for rigtro 3

SUPELCOWAX 10 80n x CTSnvn ID 1Cim itagt Ci1 Tlaquon-c 35raquoC far 4 min Wan 10 1ClaquoC at 5raquoCmin Psw Ran (2rm ID dasSfp lutJ iO JCi-Tin) SmVr--in Hi VaUe-u Glaquo 5CTIrrin N Dot FID (8 x 10 AFS) Sarrpa 1-ng ech canpcitn Oejorpticn Conditanj mdash sic Fig-re C

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 17: METHOD TO2 SitetfOaSTl - semspub.epa.gov

in mefnanbl oxic Organics Mix TO-2A contains 2rng each of the TO-2 comshypounds vinyl chloride vinyidin = cnioride ana metnylens chloride ishymslhancl

To monitor ail airborne 70-1 TO-2 and TO-3 toxic compounds use Carshybotrap 300 tubes a Supelco Therms Descrption Unit and aSUPELCOWAX 10 wide bore capillary column or a Car-be pack packed column You will gst consisient and reliable analyses fcr these compounds and for many clner airborne compounds as well

nudjronco

1 CanperS-irrt e Meiitoss lor trie Oevrnjv- zi TCXS OSSfiC Csf-powids gt Aa-tiuu Agt US E A Oocurertl o eOC-M-3J-Ci1 (Aprl 1334) flcfcrarco -ci avaasia I Su3ei=

Carbotrap 300 Thermal Desorption Tubes 115cm x 6mm OD bull

4mm ID 2-0379 2mm ID 2-C362

Supelco Thermal Descrpticn Unit 110 VAC

2-2895 shy

SUPELCOWAX 10 Capillary Column

6Qm x 075mm ID 1C iirr film 2-3723

Carbopack Packings 6080 Carbopack B- SP-100C I5g 1-165 80100 Carbcpack CGc 3-1000 I5g 1-1320

Standards Toxic O^ganics Mix TO-1A 1 m I 4-SS96 Toxic Organics Mix 70-13 1ml 4-3397 Toxic Organics Mix 7C-2A 1 m I 4-3398

eiusivcly Sy Supnco Inc

FO oek and euscn-prsparca csiumns rraquofaf c sir carog or cail oj Silo 0laquopirtrlaquon

Unil plaquosraquo call our Technical Sorvica CcDart~sn

Nanulactuad ty Oynaihorm Inc Ma-xcicij axshyclusivtly by Supslcs Inc Per inforrriiion en using laquoda bsre cjpillay eel-u^nsnpacxed column ir31ruinlaquons request 3ullaquoin 314

-bullOfrii1 Pu fJa 1310lt2Z German Pil No 1935SCC

OUPELCpiNC bull Splice Park bull Biltglinie PA 16823-0018 USA bull Phone [S1lt]3SS-3-U1 laquond[8llt] 339-3446 bull TWX 310870-3300 FAXa 4-339-304 OUPELCOBA bull Cherfndul3viJton2 bull ViCSClraquordSwitHflind bull PfloncOaSSOJ 34 bull Tillaquox19837 bull FA02a3laquo-317 -bullbull auoELOO CANAOA Lcaulaquoilaquo bull 40-320 vVyeenrfc Holaquod bull Oakviin Onwrio Cinatf uSK 3V1 -Phona C18] 848-8S10 bull FAX 448-Slaquoa-a94TshyaupELCO OBUTCCHLANOa^oM bull Kais6--Friadrlch-rtnaniidlaquo 33 bull 938Q9ad Hsn-tur bull Phona (0317aj 2SOIJS bull Tilax Bl2341 bull PAX [05172] 63C3 bull BUPSLCQ FRANea Bigtr|raquo M PUBwn Vlcrmoz 78100 S-Glaquormiin--Liyi bull Pins frtnot bullPhonf [1 ] 3d 31 1913 bull Telii 699 S79 f bull PAX (1] 39 738300

BUPCUCO JANLTObullKjiniBulding bull 1-310 Awbuitl bull MiniM-ku Toxyo Japan QS bull Phoni (C3] 337-008 bull Tilalaquo S223520 bull FAX[Q3] 509-433 bull

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 18: METHOD TO2 SitetfOaSTl - semspub.epa.gov

bullgt-^^i- Vol VIINo 3 rpVvfViV May 1988

mo S

r bull bullbull bull _

A Digsstof 3C HPLC ard Chernicsl StandafdArticlascf Current interest to Chromatographers gt j

Carbotrap mdash an Excellent Adsorbent SAMPUE

for Sampling Many Airborne Contaminants mdashyshy

Caibuu-ap high purity graphiti^ed rArbor back can adsorb ltgtr rololisa a wide rar^ of arbri2 oryunic eonshyai7iiriai A Cici=s I acisorbart (i) it h^ nc surface iors ur active sf-Jiciionr) groups The untirs 3urice is available for inicvpoundCLiois cliat ciiptnii soi^ly on diijerior (Londpn) fuiOGs 2) I corraic two nfier widely used adsorbfKta Tcnas GO and Anigtriitcs XAD-2 resins h^vs localized surface charges fov specific adsorbcnldsoi-bata inieracshytions Furiemcie Cartotrsp adsorberc is rrcve hycruphoshybic in bulllaquoLUre than ci ther of ha ravins Thlaquo icj psrfornirce is uraffcctatl by humidity Carbotrap adsorbs is free of conwiviiiaiys iiJ is not susceptible to soiv-rr- dsgrriaLici

We eviuidd Caiboti-ip adorbant fir ibmij organic conipoJriU u=ig proc^cluvcs that paral el vork described by Uia LS Eivivcinerta Frocclion Ag-incy (3 We introshyduced a kncv-n lltJegtltjc conieiitrstiort cf sciscrbate oito a Cirbotnip bt(i tlc pussed air -hrcu^h tic bed Tlie specific intention or breakihrsuyli volume (V^) of air needed to cluta vu acUorbaie wis deteMriced The larger this val the betttr tllt3 adsorbaie was rltraircd

Qiirbotrai) adsorbent traps and releases a wider ratine of airborne organic compounds than Tonux GC or XAD-2 resins

To dtiiireiirc Cuibotrap aaaorbcnts iur-etitsnal trapping range (the rar-aa of molecular size that can be trapped sucshycessfully il-tn dcscrbed) we used 33 Compounds ranging from C2 10 C14 straigbt chain ard ring compounds To charshyacterize Lha uoripocific surface properties of Carbotrap adshysorbcrt aiiaorbites with diverse functional groups were chosen We established the lower and of he functional range by setting 10 liter as the lcvest acceptable breakthrough volume The uuper end of the range was determined by evalshyuating1 the Carbotrap adsorbents ability to release large rrolccucs (eg PAHs or pesticides- through thermal dcsorpticu A 2C minute migration time and 350C temperashyture ware considered the maximum allowable conditions for proper Ihorrra dcsorption

Carbotiiip adsorbents functional range for the comshypounds studied is indicated in Table Extremely large

(contd on fugt 2)

Tiibic- 1 mdash BroaklhroiijrH Vaum__ Tor Organic Adsorlwtcs on Carbolrip Aif

laquo- bull- - -mdash

AJ-a -ale yl QflQ [nil id y L o r r c l Cotf 5

-1 -i L l o x i f i 0 -4 1 2 r bull il tf

4 H S x i fwals

S-^d i f l C x i o 05S410 ^OLIcrrLhaipound 194 s Q OS9S-I8

~ ^T -LrriC 375s 1Q- OMG11 bullbull bull-rlaquorre 5i9 x0gt OS0334 bull i-Vdiri-IJ-pMpjrul 6S2x0]

OOSC50 bull - - bull ts-jcrv 117s 10 093JOi i -bullbull 11 J-^ihorQPLhylraquolaquo 127 1V 0939S9 ~ T-i-U-^ 192x0 OWjlaquo3

bull bullbull 1 2-ichjrlaquoe1gt2iraquo 217x10 OS-99S6 bull|- ^Hirt 7S9x 10 QWS71

- r Pci ntic till 431 10 (J97100 1 1 ~t - f 816x10 O0041 bdquo bull Tol^sr 630 x 10gt Ooijg-^ (bdquobullbull 2iier^r^laquolaquosilaquo i jSxlO 039959 bullbull-bull bullbull Cy^c^TxirOut 204x 10laquo OD9531 jV-_ i-3n Ijnii-e bull bull 2-08x10 QC393S r l-Hc^^non 2-44 X 10 03i391 i4-DVdr9lrtirt U4x lO 09925 bulleuro bull n-Of^^l -101x10 OgSSiO I Siiyilaquorcnlaquo 203x10 0333S3 | V- lgt-1-f^--r1 206 x 10 0333-18 gtgt ^ 3snryiraquonil bull gt i23xlO 099990 l--i- T p-Xjiv-i bull bull bullbull 427x10 0939G3 I-- Arcjhlaquonoie bull bull laquoi0xi07 093371

Ifpi-cpyftiiiiiire 170x10 U3S3JO n-Fro^ybvrzirt 172x10 030093 bullraquo-Dlaquosre 479x10 OJ9971 n-3iybr^ine 5S3 x 10 039937 Cigthiy) 374xlO 033i99 n-Hynitani 700x10 099980 n-tJoHjoiro 103x10 099903 r-0ivttnlaquoilaquo 131xlfl s 0S93j U^ira^siinr 532x10 096309

os Tor hiji boiling irtsorliaiii must be (Jalurvirttd at laquolavaU-d iXS thar iislcuUttc for 2QC (by linoi rcijlt3i3n) for comshy

psruvn Tnlaquoe tenplaquorraquolurlaquobrvakihrougi veume corrcUticn cilaquort silo1- rtjjressiar p-ou used in hii invcitigmion were linaur

Fjruooa] rangi for Cirtsnp gtltlraquoorblaquont

I I Lxrzir compn--rO that must blaquo smortetl n h ighar icmpgr

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 19: METHOD TO2 SitetfOaSTl - semspub.epa.gov

(cant 3 wlaquolaquobullbull gtraquo Carbotrap mdash an Excellent Adsorbent for Sampling Many ^ L ontammants

r zgui v-A - The Entire Surface of Carbotrap Adsorberft is-Available for AdaorhentAdaorbate Interactions

Al - Surface Modt for Carbotrnp Absorbent (Surface Area mdash l O O m v g Charges are uniformly distribute1shyaround lite carbon atom centers

shy1 jf 1

A2 - Surface Model fur Trax GC Re-sin (Surface Area -235nrVis) Su-acg is nonunifurm in charge bullmdash chs-jfe is localized 10 oxyx-cn aioms

p units

A3 - Surface Model for Ambi-r lSte XAD-2 Rtfi in (Surface Area =364mVamp) Surface is nonunifunn in chajlaquo and is less polar than Tcrax GC

bullCH j -CH-CH -CH -CHJ -CHshy

- C H - C H - CM - CH - CHa - CH

fiirure Al raquodasu-J Scm UJ figurii AS and Ao from (3)

SUPELCO

itmpic bull o-ts iar be usert w i ^ h adjorbau-s lar^sr than nshy

A3 a ji -r^or he lower erd of l-c furctora range for Amberii e XAD-2 rssir is ii-nilr to th-u cr Carbotrap aclsorbtC 3- LlC -ppcr^li-Tiit ia rr= t--cci by Amberlie XAD-2 rts and te--pj rurfe5 aL-uvG 150C The ower iirri for Tenax GC app-fr r- o be a -iriiar OS ljacsb^e or eq- i iv^icnt atncshy

t raquoJ J ^ ^ ^ i ^ T ^ ^ ture (ej tacc -oia O-L--L-L-0-0 r-r TcrLix GC -i for Amier i -^ XAD-2 desoi~Jlion of larjer ^lolec-jles (and of certain n-o lic-les wihin the iurcticr^1 rarj-) is restricted by soIVb- bullru tciTpirjiiure effect

We uie idsrbos reissertij eijrt classes of CUTIshypounds t j-jirpare the adsorptive prcpenies of the Carshybotrap Ts -x GC -uid Arberiite XAD-2 adsorbents Car botrap ad5 -rbeit shows Beater carbir2 capacity for linear rd ycic rrjlrcjles CTahis 2- This results from its

rice arm properties (i-ea lWrg density 038gr-l - a rieoclized surface oiiarge a coiiibirruicn that pcrrnir ^r iei- inisriction bt twcen the adsorbent surface and thr ic bull-rbate Tc-rax C-C arisorbuiit a jr^-ate- adsorbing power fjj- r-pamprtncic acid is dis to ocaliied surface charges sf roirTc lor intersctiojs bullgt aeci g-oupi (Figure A)

Frtr t--a brcaktli- u^ volucc V -vo otei values can be oa -uisteci o charnc^rizc gto bulluiicrfiniuisorbittlaquo rchiticgth The eidaorptic ccsffciciu X- dtacribes the distrir-uuc - ui ths adsorbnu betvvlaquon thi 5^ and solid phase t -rj ill- ecentian oluire LU hi iidsorbeiU surshyface ire- ilie cq^ilibri crior ciiiLi-y Qr describe^ the iiiijcrl rs capaci ty for ihe iuisorbac gtrjfs valiiCi ur Xa ari bull_ rdiltu^ jcod retci-tion chayac^ris t iw The lar^c QZ v^lcb c Carbclrsp idsorbs1 i Tsbia 2 ref^t ths abliicy cf gt Ji t irc- iurfacs co ircuiiii i ha inceiuccici (FigT--e A V-IT value cin io be Uaed n preoict ti(j eishytonslvij bi r-v-ie cha adsorbent ard urtafsd iiisorbsi-es in the scne gt ccal ci^s as A cc-siad auscrbiie

Y o u c a n c o m p l c t c l v r e c o v e r a d s o r b e d co- npourtds f rom C a r b o t r u p a d s o r b e n t by r i i h o r smlvcn t or t h c r n i a l di sorp iou

tube by och soivci ad hcrMi ciesorytion technqic3 Our pr^v^s sfniiei iluwcd l -b i tunc 1 2-otaone and 2-ethoya(yiceCue wars difficult (c ticiorb from conie adsorshybcru T-j a icct ron-r ich oxygen ulcnu in ciicsa molecules forn coviJc bctia with rrttal ana sat irripui-itics on an adshysorbrnts svrfiice These idsorbai^i the are a sUigcrt test f iUorbenC surface puri ty Tc active -oups or chloroshybcnErr3 ^rLiloger r-pentunoic acid fcarbexy and b rrirs (arl-o) aiirilnrly rcven specific localised charges on an aijrct surfiiCe Aiisorbate volumes in Table 3 represhysent he - auity of adsorbate in 50 iitci-s of sir at 05 tin-cs the Gcltptitionxl Safety and Htdltk Adminis t ra t ion s thr6d Unit value (TLV) Wlcn a TLV was not availashyble lO^t was used

For aoivatcd charcoal 60 recovery of l-butinol and 2shyethcxyehylncctaL9 is typically cited as ar acceptable value For Carbotrap adsorbent recovery of these ard other comshypourds is vir tual ly convpieie by both rrathoda of deaorption (Table 5 This is dua to the high pur i ty of the sorbcnt and the cisedfc nature of iu graph zed surface

Two J6sorbing solvents were usod in this evaluation (Table iV Carbon disufide was chosen becatue it is commonshyly ulaquoerl -s a desorbing solvent for charcoal Also its high hsat cf adsorption allows it Lo rcudily displace adsorbed comshypourr3 Carbon disulfide cannoibc used with polymeric adshysorla-its such as Tcnax GC and Ajrberiite XAD-2 because

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 20: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Titbltf 2 mdash Breiiklhroujh Volumes (Vt)Adlaquoorpiion Ctxificienu (Ka) and Equilibrium Sury t iun Capacity (Q^) Value fur CarbolrHpTcndx CCa^d Amberlile XAD-2 Adsorixn

vlaquol =o-cshy-

A d s o r b n u Car ju l rsp Te--x GC D-2

n-Cocf l i ie 173x10 lGix0 2 9 a x 0 f

BL-i-yla-Tiiio C-iurobo-itoti

223 x l U r

JSSi 0S 35 x 1C

151 x 10s 153 x O

lS-1 f 0 p-V--lsna v-C-ito

4 2 - l x l O 200lt10

gt S 3 1 U

l VxlO T C - o x l O

4)6 x 10laquo n- i mi i i i^ t ic -icic bull131x10 97 - x ^ T 101x 10 Cycljlujxi-i-shya-Mcihy-2-|)rup-cl

i O - l x l O l5iVJx 10J

l C i x l O 6SOx 10=

6 2 7 x 1 0 542x 10

r i

Table 3 mdash D c s o r p l i u n Sfficienc for Ci i rSol Adsorben t by Si Ivcnl and Tl iermal D o s u r p l i o n

f)curlun E f f i c i e n c y i^lt)

rbullSolvent L raquooraquopt iun

Carbon Thermal A U s i i r l K i U v u IUTI A c c l g n i l r i l i Di su l f i i lo DiMorp l iun

Ti-l v-nbullbull bdquo bdquo

---t1 1^

ldegshyM102 103 10U 101 100 fi

111

tMI0i lOi l i i j_

_ 10-

111 i nr i l lLOr riju-r i us in

IDfi - 109

it djgrscita then Thus you are forcod ia uss other solvents thai laquony not remove the hcl=orbae-s eifsctively The oJier solvent aixloiiitnle is often used in l iquid ehrciiratographic

Theriv clcrsorptior has now gai rd itcccpu-rics because cf iroA1 deirLirclinjj rcijuluiora fron ihe C5 iVtii roiiwunfui Vrutclo 47ltci t-i Xatioual Inzii t i i tefor Qcaipntionshyni Stfdy nud Heutli and other agencies Vher recovered by solver Jc-^ci-plior a trapped arsc -batc is d i l u t e d In coraquoshyirist wlufi a suitablu ijdsorbont is li oseti1 ailscrbaes are re- aast-d effect ively and undi lu ted Thus wiih thermal clesorption you can nyjnitcr small a nouris of airborne con-t nnnuiVvS UuU would oLhorwise bo uj icttcrabld

GO resin releuses toluene b-snztna and tnchloshyc residues during hernal d ssorptisn Residues are

at 50C At 250C the resin will completely pyrolyzc Thus Ambc-rli tc XAD-2 is poorly suited to thernril dcsorption and Ten ax GC must be careful ly conditioned to preveiu ar ifsct furrintion Carshyboriqi adsorber in contrast is siSa Ht temperatures of

Allliou(h Carboirsp adsorbent oroe carre with wida

particle size distribution we now offer the uniform sizfetl large pnrlicle rrnierial (2040 mwh) This further reduces back pressure

Carbolrap sidsorbent Is available in 7mm OD x 5mm ID x 10cm long ORBO-100 solvent dcsorptfon tubes (350mg 175mg bed weights) or in tubes for ihfcc widely used thershymal desolation units It also comes in bulk Of course we can prepare custom Carbotrap tubes to your specifications For infonration about thermal dosorpton or dcails on custom Carbotrap tubes call our Technical Service Department

ori polsr andor icnic f supj wi an aljorbwl jurfiee car cauM disshy of an aiijcrbau- or of the idao-^eri 5Jrt^ce bondraquo fonrirg

raquorufaci

K U alaquo

Curnotrap Tcnfix GC XAP- i Cirb-j t rni i TVrivs GC X A U - 2 r2CC J i l ^ l C S4 (7x 0 - 2SQ 9 - ( x a i 2 2x U

121 x l O 1 SJS- L O 3 H - ^ x i O - 1 bull351x10 1 07x10 71SC

5 5xlO 3^9 T 10- 7 2 C x Q s 7-OxiO a i S N i 22 x G gt

23C x0-a 3 53xlO- 1131-J I S Z x l O 1 gt J 6 x lt r 3 O x i C -

1 U x l O 315 ID7 7 i9xi - 9 i 4 i U - 3 7 J x l O 1 221 x - U - bull234 x a 2 je o - i s i x i o - 1

T 6 s l O 3 9 lt l x l O - 431 x l o 1 10x0 2J5- 101 4 5 x l O - 519 x l O 1 4 2 8 x 1 0 - l ) 7 x U -

35I- x 10 J l o b t l O 1 606 x 1 C - 59xlO- 203 x 0 deg l w x l O 1

Carbol rap 100 Thermal DcsOi-pJion Tubcj1

- - - bull - bull - - - bull

o

W--Vv- bullbullbullbull--bullbull shy J ---mdash

ft bull

i -

ubs storage conla insr A 1

iciudsd w i t h tuDe shy

Thltrwl T c f o r ^ t i u n

U - i l l Tulii ^pctifioiiiins

S ips lcu jflass Smm OU x -irrr ID x 11Sen long

TkTi=-8 sCKiiless sees lM OD x 7 long 58ODx7lo ig

Jj stairjlessscc-cl llODx3nr^

OHEO-100 Sci--=-t DcicrpTion iXibes

C-rscrap adsorbent (2040rcsh) 5

Cil No I r i c

l U l J C

2-C2^S 52S

2 - 0 ^ 4 1 2-0239

30 7)

2-0240 24

2-02552-02S7

$9525 SSO

Fr ^6i-ripli f trioinp lnTal d^o^lian iotas irii l-i 3u^-lco Thcrtval Ois rjj-ian Lrii pieast rtfti1 to our csialoj

1 Kilaquo-i-v AV raquori Yl Y-ssris Cgtl AJsorpion Cirsmalraquoigtphy tic-Jm rc Niv Vark pp -0 iJ5i

rd Ei) WH Kn-ir-an 4 Claquo Sraquon rrjn-iraquoi

8 Chirjcic-iulion of Scrboni Reiins for JM in Ai-LOire Srivirenmcniul San-pinc US EPA Dcciriri NoSOO7-78-04-1 tlTraquol

J Vtjtd Keenan rj8 HiiL FundJTnrulJ 3f Cnllew Chimi-iry 2ni EJ1 I-rrper

Fjfrcr eraquo no1 gtihllaquo trtir 5ppico

SUPELCO

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 21: METHOD TO2 SitetfOaSTl - semspub.epa.gov

Vol V No 5 November 19S6 the

SupelcoReporter

Chromatography and Chemical Standards News

A Ciges of GC HP-C znc Cn^nicsl Standard Anlces of Curi-ert Interest to Chrorra-ographers

New Thermal Desorption Tube for Monitoring Hazardous Airborne Hydrocarbons - v

GC

fe^

Carbotrap 300 tubes efficiently trap and release US EPA TO-1 chlorinated and nonchlorinatcd hydrocarbons

Arc you required tu monitor air levels of the a l ipha t ic aroiratic ard chlorinated hydrocarbons listed in US Envirlrircnti1 Pivection Agency TO-1 ircthodclcgy (D If so you apshypreciate our new nrjlj-bed thermal dciorpiion tube This nev tub efficient-Jy adsorbs and -ec-sscs all of ihejc corshypounds vhether present individually (^ in soire industrial cnvironn-ents) or in ccmpw mixtures (like the ambien air at toxic vastc sites)

Tie new Curbotrap iOO thermal desorption tube was designed to retain vinyl chloride a chlorinated hydrocarshybon with a small retention volume while cfiicierilly adsorbing and relcasirg the higher ivolcculir weight compounds (eg alkyl benzenes) The back bc-r 12i3mg ofCarbpsievc S-III traps viny chloride and other light compound Th= middle bed 200rrgtjj of Carbbtrap trac the C5-C3 currpounds The front bed SOOmg of Carbotrap C traps the hcavi shy

est compoi-i(is (Tnbla 1) li total the fesiji of the Carbotr^p 300 tube allows sanpiijig voiuircs of up to 10 liters to be ucd without breakthrough by any of lhe15 compounds

To succaisfully monitor EPA TO-1 hydrocarbons and chlorinated hydrocarshybons you must use a reliable system We suggest cur reusable thermal dcscrption tube a suitable analytical column and an efficient thermal desorpshytion unit to transfer the sanpSes from tlic tube to the column

We selected two GC columns (a packed column and a capiary column) on the basis of their ability to refocus the thermally ciesorbcd compounds then effectively resolve thsm with good peak symmetry We evaJi^crJ raquorapJshytizsd carbon black malerias as packings because their high surface areas exhibit excellent refocusinj capability

The packing we chos^ Carbopack C01 SP-10004 (Figure A) provided

k(-iitdonpagi3)

mdash TO-1 Olorin-fec fl b) Thermal OrEOrp t ion nnd Aual on n Pkcktd Column

Ai niy iKi Cir bullbulllaquo mdash J6 dilhrHi-k (V i 3P-iltXX) i x iS SS gtbullbull Ti-i bullJVl fjr i -riM bullbull bull -iflC ill JCC bullbull I i UlTi-- iiOC iraquo bull lii-soi-ji-i-n -uh- o -rlii-it) flrvnin Ho EX- K l gtlaquoV J x 10 A Fa Sarjc 0ii wivi| -I1

f imraquo jlllC nvi Vlvi- Ciilllpurt fi Trlaquo i-raquo iraquov

B mdash TO-2 V Hydroci-jiins ijy Thermal Desorpl ion ind Ann ly j i i on a OTSlliin ID CapIiry Column

Ceiiliiaw - SWFEICQWAX 10 tttm t llStL-x 1 Co) Ttaip 35C ft raquo-gtbull iw

10 220C it SCmir- lijamp Dei Ten) KOC Flnw Rsu liiai Iublt in ta-jma) lOinlmin Ulaquo Mahc-uj) Gas 4flinlraquon N HlaquoL KID Srns JO i 10 Fa

laquo 10J laquoinjinri02ii]ii -ich cumponcnt Thraquoreul DtMiviiw Coniliiisn - TVIlaquo Dcwrp Tt-np C-iiei JSOCl Riin Vjgtr Cirrjur amp TVan Llrlaquo Ttrji

16

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

Jiii-^4-ci 1 Csibosioe S - I I J Ciirbou-a Cjrbutrap C (U5-if) (200m) (JOOnif)

i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

pThlaquoQrcicfl V

bull-oo-mlfbullbull rjbCshyi equ ipshy

-nen obullsa bo

yn TAv

-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

-060 129 112

bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

Carbotrap 300 Thermal Dssorplicn Tube 315cm x Grnn OD x 4mm ID

2-0379 $32 lu fce SO100 Carbopack C01 SP-1000 Icg-

1-1S2Q S100 Kor slock raquonC euflctn-prejiircd columns ref i r to our laquouluj or exll oui- 3ilo Oiparlment

SUPELCOWAX 10 Capillary Column 50m x 075mm ID 10 m film

2-3723 $499

Supclco Thermal Desorption Unit (110 VAC)

22895 $1300

Fur Injrmacion about tht Supclco Thersial Dcsorpticn Unit or wrts vur wUlc bore capillary ccluirni in your packsd eolunm system plcisa crl our Tichnisal Service Dcpartmert

Page 22: METHOD TO2 SitetfOaSTl - semspub.epa.gov

(contd frcr f --NewTherjtKi DCS or p t i o n Tube foi M o n i t o r i n g Hazardous Airborne Hy

the best pe-fr^-i i-pound icltraquoramaterials O -^ -bull bull bullbull 60r x

p070mm ID 5_i-i-- - i vX iO c A p i i shylary colurr- -bull-- ricir cr ri-oive heshyxylcne Ubsr-- -bull E THs widrbcre capilary bull-bull-- oj5 ipleiwith a wide r-i^ f bullbullbullbullbull cncershy

traciors laquo1 to gtiCvv It can also -L bullA- ticn flow -rv -bull mcnt used-vi1 a -^

To analyze ire c-r TO-1 coir PC 5 bull bull-bull- the packed gt-bull -Vi

tible 1 mdash Ii ja MOii ( h Volumes in Iiors) for US EPA TO-1 Hydrocarbons on the CiirliJsiov- -niCirbotriijCinjotrip C Thermal ncsCi-ptionTube

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i - Vinyl Cilcr^ i - gt~ Chlororcri 12-Dichurcc-tibullbullbull lJl-TViiihlorx i o Carbcn UrfrH e 12-Dicrorji] jM-j TVichorolaquoli-l(o Bromofoin Tcrraquochlcrocyiois Chlcrobenxct

n-Hcpcane1HiplcncBoniena Toluere Ethyblaquorelt p-Xyicrem-Xycnso-XylcreCvmono

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bull-oo-mlfbullbull rjbCshyi equ ipshy

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-^i of ncrhalooo-ated hydrocarbons -hraquopLe srd olucne o-xvUie and

-urr-- cueUi iroin he packed cc~r Thcie bullbullot^pnunds sm be rsshy

iuiv^ by isirj the oapill-ry colurn Sir fvo psir of chlrinaed hyshy

oo-ori (carbon tetrachloride and I l i - t r ichloroethar e cicrccrir and teshy rfclyrcchyiene) coelute from the cairlary ccluni cut are resolved by

To su-gt25Sfiiy ransfsr the hydroshy i-^rbcra f-n ihe thernrsl deorption

ur Lo ic jcuir -ve used a S^pslcd

3 j rp i ion Lri TVansicr Sitnplcj f am

11 o-4 27

47 1 63

25 17 11

315 2c2 2S41

u 130

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bull 110 110laquo 278

drocarbmis Thermal Dcsorption Unit (Figure Q This unit desorbs tha hydrocarbons bnlshyl is t ical ly at a rate of approximate11

iSCaeccrri raising the tuba temperashyture from 35C to 330C in 16 seconds A segments 01 the transfer system (vaivirg uibirg ard transfer Una) tcshytween the tube and column are inert The entire transfer system is also heated el iminating ccid spas wher aiijilytss could cciiclirnse Tiua thj ssmple is aharpiy focused it the column inlet ard the ccrjipounds car be efficientshyly sepiu-ated

Concroi aampmples for cslibrrtins the thermal desorpicn uni t and evaluating desorptior efficiency car be iijecsd into the unit s injection port They are delivered onto the GC column through the same pachway desorben sampler follow The thermal desorption unit CB- bt used viih either a packed column or A capillary column Thus it is ideal for TO-1 cheiniciils analyses because w scirft asmplc-s boh crluivin types msy bo needed to perform n complete analysis

Our new iviuiti-oeci ubc in conjuncshyt ion with a Supcca Thorns DcaOrptio1 Lnit and ths culutvns described can bshyused to ropior r airborne TO-1 coirshypourds We arc now invsstigatnij the uie -jf thia ubfi for coltrCtii-ij similar and more volatile cuMpcund now Ui|pil bv pniijs and trap (TO-2) or ccld riij (tO-3) uroccciurcs

1 CWirntin-u for IT CitTiiiii-jii

Lr Dilaquo-jre-i Xo SCnM-pound- i -CJ rApi- 1 JSl)

cfrri-rce r uvaiii i l i ir (roir 3-in-o

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