カールフィッシャー電量滴定法によるアミン化合物中の水分の定量

概要

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Determination of moisture in amines by Karl Fischer coulometric titration was studied. Measurements were carried out in the commercial anolyte to which salicylic acid had been added as a neutralizer. The amines, the moisture in which could not be determined by the present method, were classified into the following groups ; 1) aliphatic diamine compounds, 2) aromatic diamine compounds and 3) the compounds in which amino groups bind to benzene neucleus. In case 2), the oxidation of the amines at the anode seems to be the reason why they could not be determined. In cases 1) and 3), the reaction of amines with iodine generated electrolytically may be the reason. For other amines, irrespective of their pK_a values, the moisture contained in them could be determined by the present method. Good agreements were found between the results by the present method and those by the volumetric titration method.
社団法人日本分析化学会の論文
1985-12-05