トリメリト酸溶離液を用いる陰イオンの間接紫外吸光検出イオンクロマトグラフィー

概要

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A simple, sensitive, and convenient method of ion chromatography (IC) by indirect UV-photometry for the simultaneous determination of five common anions (PO_4^<3->, Cl^-, NO_2^-, NO_3^- and SO_4^<2->) was established using a Trimellitate (1,2,4-benzenetricar-boxylate)/methanol eluent and a low capacity silica-based anion-exchange column (TSK-guardgel QAE-SW; capacity : ca. 0.3meq./g ; 4.6mm i.d.×15cm). A good separation and detection of the anions was accomplished within 20 min by the IC with a 0.5 mM Trimellitate/20% methanol eluent at pH 6.0 and UV-detection at 270 nm. The detection sensitivities of the anions by the present method were 2〜3 times higher than those by the previous method (IC by conductometric detection using a 1.25 mM Trimellitate eluent at pH 4.65). The present method was successfully applied to the determination of anions in river water samples with no interference from HCO_3^- and Mg^<2+>- and Ca^<2+> Trimellitate complexes.
社団法人日本分析化学会の論文
1994-06-05