Determination of Organic Sulfur Compounds in Air by GC/PFPD with Thermal Desorption

The hydrogen sulfide,methanthiol,dimethyl disulfide and methyl sulfide in air were effectively absorbed by TANEX tubes which frozen at-70 ℃ with solid CO2 and then determined by GC/PFPD with thermal desorbed equipment on 120 ℃.The experimental conditions were optimized.The detection limits range of 4 organic sulfur compounds was from 0.1 ng to 0.5 ng.RSD range of standard tube was from 12.7% to 16.3%.Spike recovery range of air was from 78.3% to 87.7%.