공기 중 황화합물 악취의 GC/MS 분석
Analysis of Odorous Sulful Compounds in Air by GC/MS
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Abstract
Capillary column gas chromatography method was applied for the analysis of sulfur compounds such as hydrogen sulfide (H2S), methanethiol (CH3SH), dimethyl sulfide ((CH3)2S), and dimethyl disulfide ((CH3)2S2) in the ambient air. The concentration of sulfur compounds is usually very low in the ambient air, while their high reactivity makes them difficult to keep in the preconcentrating method without sample loss. In this study, an analytical method is evaluated for the analysis of sulfur compounds using an automated preconcentration system with GC/MS. The preconcentration system was set to reach to -180oC by supplying liquid nitrogen, and sulfur compounds were analyzed under the dry (or humid) air condition. The recovery rates of H2S, CH3SH, (CH3)2S and (CH3)2S2 were turned out to be 79, 74, 77 and 86% respectively under the humid air. The results show that the possibility and limitations of sulfur analysis of ambient air using the preconcentration system with GC/MS.
참고문헌 (10)
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