14 Compounds associated with odors from mold and meldew

Electronic Sensor Technology WWW.ESTCAL.COM

14 Compounds associated with odors from mold and meldew

• db624 column for these measurements

•MDL for selected compounds

• Air samples (40oC vial temperature)


Mold & Mildew can cause substantial loss of property value

Indoor Atrium open to up and

downstairs areas


Hotwater heater can be a major source of mold

Leakinghot water

heater

HVAC unit distributes molds throughout house


3 Octanol in air

5 second sample, 40oC detectordb624, 10ps-2a1b method

Stock: 10 µL/mL 3-octanol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 40 ppm or 202 ng/mL

9,598

11,394

C8H18O


1-octen-3-ol in air


Stock: 10 µL/mL 1-octen-3-ol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 41.4 ppm or 206.4 ng/mL

8326

88579795

C8H16O


2-heptanone in air


Stock: 10 µL/mL 2-heptanone in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 44.9 ppm or 199.8 ng/mL

C7H14O

5002539257975677


3-Methyl-1-butanol in air


Stock: 10 µL/mL 3-Methyl-1-butanol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 58.3 ppm or 200 ng/mL

C5H12O

3322

3543

3738

45391627 @60C


Alkane indexing

c11 c14c13c12c10


3-hexanone in air


Stock: 10 µL/mL 3-hexanone in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 51.8 ppm or 202 ng/mL

C6H12O

9542

9743


2-Pentanol in air


Stock: 10 µL/mL 2-Pentanol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 58 ppm or 200 ng/mL

C5H12O

6103

6212


3-Methyl-2-butanol in air


Stock: 10 µL/mL 3-Methyl-2-butanol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 59 ppm or 203 ng/mL

C5H12O

1758

1618


trans 2-octen-1-ol in air


Stock: 10 µL/mL t-2-octen-1-ol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 42 ppm or 209 ng/mL

5464

5592

47685@40c

C8H16O


3-octanone in air


Stock: 10 µL/mL 3-octanone in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 41 ppm or 204 ng/mL

C8H16O

10785

11893

10992


Methyl Furan in air


Stock: 10 µL/mL Methyl Furan in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 70.5 ppm or 225 ng/mL

839789

C5H6O


t-amyl alcohol in air


Stock: 10 µL/mL t-amyl alcohol in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 58 ppm or 199 ng/mL

532505

C5H12O


2-isopropyl-3-methyloxypyrazine in air


Stock: 10 µL/mL 2-isopropyl methyloxypyrazine in methanol 1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 42.4 ppm or 251 ng/mL

17801

19640

C8H12N2O


2-methyl isoborneol in air

5 second sample, 20oC-60oC detectordb624, 10ps-2a1b method

Stock: unknown concentration 2-methyl isoborneol in methanol 1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: unknown

539@60C

1629@40C

5277@204847@20C

C10H18O


Geosmin in air


Stock: 99.5 µg/mL geosmin in methanol1 uliter injection of stock into 40 mL vial (40oC)==>> Vapor Pressure: 0.35 ppm or 2.5 ng/mL

15786

13989

10337

C12H22O


Resolving Co-elutione.g. octanol vs octanone

C106.62

C1111.58

Octanone6.72

Octanol7.14

80oC isothermal Column


Alkane Cal Runs


c6c7

c8

c9

c10

c11

c12c13

c14


Results

MDL (50 sec sample, 0oC Detector)

Summary of Results

Conc. ppm

Conc. ng/mL

sample Time

Detector Temp

Counts Hz

Response Hz/ppb

Response Hz/ng

MDL ppb

MDL ng

3-methylfuran 70.5 225 5 40 800 0.45 0.14 22.0 70.3t-amly-alcohol 58 199 5 40 505 0.35 0.10 28.7 98.52-pentanol 58 200 5 40 6212 4.28 1.24 2.3 8.03-methyl-2-butanol 59 203 5 40 1700 1.15 0.33 8.7 29.93-hexanone 51.8 202 5 40 9743 7.52 1.93 1.3 5.23-methyl-1-butanol 58.3 200 5 40 4500 3.09 0.90 3.2 11.12-heptanone 44.9 199.8 5 60 5700 11.43 2.57 0.9 3.91-octen-3-ol 41.4 206.4 5 60 9500 20.65 4.14 0.5 2.43-Octanol 40 202 5 60 11400 25.65 5.08 0.4 2.03-octanone 41 204 5 60 12000 26.34 5.29 0.4 1.9trans-2-octen-1-ol 42 209 6 60 5464 11.71 2.35 0.9 4.32-Isopropyl-3-methoxypyrazine 42.4 251 5 60 19643 41.70 7.04 0.2 1.42-methyl-isoborneol 5 40 1629geosmin 0.352 2.5 5 20 16000 909.09 128.00 0.01 0.1

Boiling Point

Mol Weight

sample Time

Detector Temp

Retention Time Counts

Kovatch Index

3-methylfuran 82.10 5 40 2.06 800 c6.2t-amly-alcohol 102 88.15 5 40 2.2 505 c6.52-pentanol 118 88.15 5 40 2.5 6212 c7.13-methyl-2-butanol 112 88.15 5 40 2.4 1700 c73-hexanone 123 100.16 5 40 2.98 9743 c8.13-methyl-1-butanol 130 88.15 5 40 2.66 4500 c7.52-heptanone 150 114.19 5 60 3.54 5700 c91-octen-3-ol 174 128.21 5 60 4.14 9500 c103-Octanol 175 130.23 5 60 4.18 11400 c10.23-octanone 168 128.21 5 60 4.3 12000 c10trans-2-octen-1-ol 88 128.21 6 60 4.86 5464 c112-Isopropyl-3-methoxypyrazine 152.20 5 60 5 19643 c11.12-methyl-isoborneol 212 154.25 5 40 5.98 1629 c12.3geosmin 182.31 5 20 7.94 16000 c15

Date post:	14-Jan-2016
Category:	Documents
Upload:	uyen
View:	27 times
Download:	0 times

14 Compounds associated with odors from mold and meldew

Documents