시료채취 용기에 따른 황계열 악취물질의 안정도 평가

Abstract

In this study, experiment was conducted to measure stability of sulfur compounds by Tedlar bag and glass bottle as a function of elapsed time. Stability of standard gas was measured up to 15 days in 1L Tedlar bag and 2L glass bottle filled with hydrogen sulfide, methyl mercaptan, dimethyl sulfide, dimethyl disulfide, carbon disulfide in ppb level. In order to measure the effect of water vapor, an experiment was also carried out at different water vapor content (RH : 40%, 70%, and 100%). The recovery rates from two sampling containers were kept above 90% for five sulfur compounds (H2S, MM, DMS, DMDS, and CS2) in Tedler bag and glass bottle by first 3 days. However, the stability was observed to be decreasing with an increase in humidity.