Industry: Environmental
Instrument: AUTOCan 12 Whole Air Autosampler/Concentrator
Evaluation of EPA Method TO-15 and Ozone Precursors (PAMS) with the Teledyne Tekmar AUTOCan™ Whole Air Autosampler
Method TO-15 is used to analyze whole air samples in specially treated stainless steel canisters known as SUMMA canisters. After the sample is introduced into the canister(1) an aliquot is taken from the canister through the use of a vacuum pump and is concentrated on an absorbent trap. The VOCs are then desorbed to a cryofocusing module. After all analytes have been desorbed, the cyrofocusing module, it is heated to inject the VOCs into the GC/MS.
The Teledyne Tekmar AUTOCan was retrofitted to use a 12-inch internal trap. The benefits of a 12-inch trap include:
- More packing material available for analyte trapping
- Added expansion volume during desorb preheat and desorb steps
- Same trap size as Teledyne Tekmar’s purge and trap instrument, making several different packing mixtures available (such as a Vocarb 3000)
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