A MULTIPURPOSE SAMPLING LOOP FOR ANALYSIS OF NANOGRAM TO MILLIGRAM PER CUBIC METER LEVELS OF SULFUR-COMPOUNDS IN THE ATMOSPHERE, NATURAL-GAS AND GASEOUS FUELS

A multipurpose sampling loop coupled with a GC-sulfur chemiluminescenc e detector (SCD) for analysis of nanogram per cubic meter to milligram per cubic meter levels of sulfur compounds in the atmosphere, natural gas and gaseous fuels is reported in this paper. Samples with higher concentrations of sulfur compounds (> 70 mu g/m(3)) can be introduced to the GC-SCD by the sampling loop without cryogenic trapping. If the concentrations of sulfur compounds in the samples are lower than 70 mu g/m(3), the sampling loop can be used as a cryogenic trap. This devic e is very useful for laboratories which handle different samples with a large range of concentrations of sulfur compounds.