Conclusion
This study investigated the stabilityof very low level sulfurVOCs (1-20ppbv) in
SilcoCan™ and electropolished canisters, usingboth drynitrogen and humid conditions.
The electropolished canisters exhibit degradationof reactive sulfursVOCs such asH
2
S
andmethylmercaptan and ethylmercaptan. Bothdryandhumidified11ppbv sulfur
VOCs exhibitedvirtuallynobreakdownor reactivity inSilcoCan™ canisters after 6days
of storage.
References
1. QuangTran, You-Zhi Tang; StabilityofReducedSulphurCompounds inwhole
Air Samplers, 1994AWMA/EPA International Symposium ofMeasurement of
Toxic andRelatedAir Pollutants.
2. Hoyt, Steven; Longacre, Vivian; andStroupe,Michael;Measurement of
OxygenatedHydrocarbons andReducedSulfurGases byFull ScanGC/MS: EPA
TO-14;
SamplingandAnalysis of AirbornePollutants
, EricWinegar, Lawrence
Keith.
3. Parmar, Sucha;Kitto, Andrew;Ugarova, Luda:AStudyof “HoldingTimes” for
SulfurCompounds inRestekSilcoCanCanister, 1996AWMA/EPA International
Symposium ofMeasurement of Toxic andRelatedAir Pollutants.
4. MethodTO-14A, Determination ofVolatileOrganicCompounds (VOCs) in
AmbientAirUsingSpeciallyPreparedCanisterswithSubsequentAnalysis by
GasChromatography;
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Jan 1997
