Post on 22-Feb-2016
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Advantages of a Syringe Driven Sample Introduction Accessory for ICP SpectrometryJerry Dulude and Scott Bridger
Glass Expansion
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Assist Automated Productivity Accessory
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Assist components
Niagara II Plus™ Rapid Rinse accessory Sample syringe plus drive Built in switching valve Built in peristaltic pump Optional internal standard syringe plus drive
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Niagara II Plus
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Niagara II Plus Flow Diagram
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Niagara II Plus Flow Diagram-2
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Screen display of Niagara II Plus software
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ICP-MS Carryover Comparison
0.00
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14.00
Blank1
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ppb
Bor
on
Standard
w ith Niagara
Boron
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
ppb
Mo
Standard
w ith Niagara
Moly
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0.20
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0.80
1.00
1.20
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ppb
Zn Standard
with Niagara
Zinc
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
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ppb
Tl Standard
with Niagara
Thallium
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Niagara II Plus Selectable sample loop Optional internal standard lines Positive displacement pump Multi-stage valve Sample does not contact pump tubing
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Standard operation Niagara II PlusCycle time Rinse time Cycle time Rinse time
Probe to sample 5 0 5 5Uptake delay 15 0 5 5Stabilization 10 0 10 0Read 15 0 15 0Probe to rinse 5 0 0 0Rinse 30 30 0 0TOTAL 80 30 35 10
Time Saving for Niagara II Plus
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Additional Assist Features
Precision syringe and drive for sample Optional precision syringe and drive for
internal standard
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Syringe vs. peri pump
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Advantages of Syringe Sample Delivery Computer control of delivery speed Broad selection of sample/IS ratio High precision for scanning systems
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e.g. 20x dilution with peri pump @ 0.5ml/min uptake 0.38mm ID (orange/green) 1.75mm ID (blue/green) Pump speed=2rpm
Very Noisy Signal
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Assist Performance on a Elan9000 ICP-MS
Uptake rate: 0.5ml/minSample: .025ml/minIS: .475ml/minDilution = 20x
* Internal standards
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*
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Assist Productivity Enhancement
Without Assist With AssistCycle time Rinse time Cycle time Spray chamber
rinseProbe/uptake line rinse
Probe to sample
5 0 5 5 0
Uptake delay 15 0 5 5 0
Stabilization 10 0 4 0 4
Read 15 0 15 0 15
Probe to rinse 5 0 0 0 0
Rinse 30 30 0 0 0
TOTAL 80 30 29 10 19
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Productivity comparison*
Standard operation Niagara II (w/o FIA) Niagara II Plus Assist
19% 27% 43% 52%
* % of cycle devoted to measuring signal