CRYOGENIC TRAPPING OF REDUCED SULFUR-COMPOUNDS USING A NAFION DRIER AND COTTON WADDING AS AN OXIDANT SCAVENGER

A commercially available Nafion drier (Perma-Pure) was tested under laboratory and field conditions and shown to be suitable for measurements of reduced sulfur compounds such as H2S, COS, CH3SH, CH3SCH3 (DMS) and CS2 in dry and humid air in the pptv-range. For the scavenging of oxidants we combined the Nafion drier technique with a cotton oxidant scrubber. Results obtained under laboratory conditions with humidified samples and in the course of a small field experiment confirm the oxidant scrubber qualities of cotton and indicate that the cotton oxidant scrubber in combination with a Nafion drier is suitable for measurements of nearly all reduced sulfur compounds except CH3SH.