Determination of sulfur-containing gases by a deactivated cryogenic enrichment and capillary gas chromatographic system
Determination of sulfur-containing gases by a deactivated cryogenic enrichment and capillary gas chromatographic system
复制标题
失活低温富集毛细管气相色谱系统测定含硫气体
DOI：
10.1021/ac50042a007
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发表时间：
1979
影响因子：
7.4
通讯作者：
D. Adams
中科院分区：
文献类型：
--
作者：
S. O. Farwell;S. Gluck;W. L. Bamesberger;T. Schutte;D. Adams
一种新型的气相色谱分析方法是用一种去活化的涂壁玻璃毛细管开管（WCOT）柱来测定空气样品中的还原含硫气体。这些去活化的高分辨率WCOT色谱柱可对H/sub 2/S、COS、CH/sub 3/SH、CH/sub 3/SCH/sub 3/、CS/sub 2/、CH/sub 3/SSCH/sub 3/和其他有机硫物质等化合物进行最佳色谱分离。此外，WCOT柱、失活GC和火焰光度检测器（FPD）的组合增加了GC/FPD方法对硫化物的灵敏度。GC/WCOT/FPD仪器还设计为与低温取样程序完全兼容。这种表面钝化的低温浓缩系统已被证明在低浓度和低于ppb浓度下对重要的无机和有机硫化合物提供40%至约100%的已知采样效率。所描述的方法已成功地应用于现场分析的硫化合物排放的生物源。
A deactivated glass capillary, wall-coated open tubular (WCOT) column is the heart of a novel gas chromatographic procedure for measuring reduced sulfur-containing gases in air samples. These deactivated, high resolution WCOT columns provide optimal chromatographic separation of compounds such as H/sub 2/S, COS, CH/sub 3/SH, CH/sub 3/SCH/sub 3/, CS/sub 2/, CH/sub 3/SSCH/sub 3/, and other organosulfur species. In addition, the combination of WCOT columns, a deactivated GC, and the flame photometric detector (FPD) increases the sensitivity of the GC/FPD method for sulfur compounds. The GC/WCOT/FPD instrumentation is also designed for complete compatibility with a cryogenic sampling procedure. This surface-deactivated, cryogenic enrichment system has been shown to provide known sampling efficiencies between 40% to approximately 100% for the important inorganic and organosulfur compounds at the low and sub-ppB concentrations. The methodology described has been successfully applied to field analyses of sulfur compound emissions from biogenic sources.