Trapping Efficiency of Various Solid Adsorbents for Sampling and Quantitative Gas Chromatographic Analysis of Carbonyl Sulfide

The trapping efficiency of fourteen solid adsorbent tubes for sampling trace level of carbonyl sulfide was quantified. A thermal desorption gas chromatographic method for the accurate separation of carbonyl sulfide from other simultaneously collected reduced volatile sulfur gases was developed. Results demonstrated that Silica Gel and Carbotrap 301 were the best solid adsorbent material for trapping carbonyl sulfide if the sweep gas or the sampled atmosphere is dry. Molecular Sieve and Carbosieve SIII (along with calcium chloride in a drying tube) were the best solid adsorbent material for trapping carbonyl sulfide if the sweep gas contains moisture (i.e., normal field sampling conditions).