テトラチオン酸イオンのシアン分解とチオ硫酸イオンおよびチオシアン酸イオンのイオンクロマトグラフィーに基づくテトラチオン酸イオンの分析法

概要

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Cyanolysis of tetrathionate has been applied to the identification and determination of tetrathionate, in which thiosulfate and thiocyanate formed by the cyanolysis are measured by means of an ion chromatographic technique. When tetrathionate was allowed to react with cyanide, 1 mol of each thiosulfate and thiocyanate was stoichiometrically formed from 1 mol of tetrathionate according to the following equation. S_4O_6^<2->+3CN^-+H_2O→S_2O_3^<2->+SCN^-+SO_4^<2->+2HCN The optimal conditions for the cyanolysis of tetrathionate and ion chromatographic measurement of the formed thiosulfate and thiocyanate were established. Tetrathionate was found to be identified by ratio of [S_2O_3^<2->]/[SCN^-] because the ratio gave 1 for tetrathionate and determined by the measurement of the thiosulfate and/or thiocyanate.
2006-03-30