硫化物イオン電極をセンサーとするキャピラリーガスクロマトグラフ用ガス電極検出器 : ガスクロマトグラフ用ガス電極検出器(第4報)

概要

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A capillary gaschromatographic detector for the selective detection of sulfur-containing compounds was developed in our laboratory, which uses a commercially available sulfide electrode as a sensor. Compounds in the sample (split 10 : 1) are separated on a gaschromatographic capillary column using hydrogen as a carrier gas. The components eluted from the column are passed through a fused-silica capillary tube (57cm×0.53 mm i.d.) packed with silica wool, and heated at 940℃. By this treatment, sulfur compounds can be converted to hydrogen sulfide and hydrocarbon compounds to methane. The decomposition gases are blown upon a glass rod (about 0.1 mmψ) in contact with the sensitive surface of the sulfide electrode. An absorption solution containing 0.1 M NaOH and about 10^<-7> M Na_2S flows (1.7 μl/min) through the glass rod, where the hydrogen sulfide is dissolved in the absorption solution. The potentiometric output of the sulfide electrode is digitized and transferred to a home-made microcomputer system. A very sensitive, selective detector is obtained, and its repeatability is good.
社団法人日本分析化学会の論文
1997-10-05