硫黄化学種のサプレッサー型イオン交換クロマトグラフィーにおける芳香族ポリカルボン酸塩溶離剤

概要

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Phthalate and 1,3,5-benzenetricarboxylate (BTC) were investigated as eluents for the separations of six sulfur species of sulfate, thiosulfate, thiocyanate, dithionate, trithionate and tetrathionate from their mixtures in a suppressed ion chromatography, in which separation columns of HPIC-AG4A and HPIC-AS4A in series and a conductivity detector were used. When a 2×10^-4 M phthalate eluent (pH 6.5) containing 5×10^-6 M BTC was employed, sulfate, thiosulfate, thiocyanate and dithionate were found to be eluted within 40 min. A 2×10^-4 M BTC eluent (pH 6.5) could separate completely the six sulfur species; tetrathionate required long elution time (65 min). The suppressor (AMMS) enhanced greatly chromatographic peak-height for each sulfate, thiosulfate and thiocyanate even when a weakly acidic eluent of 2×10^-4 M phthalate-5×10^-6 M BTC mixture was employed. The proposed method could be successfully applied to the detarmination of sulfate and thiosulfate in hot-spring water sample.
東海大学の論文