プロピレンカーボネートの定量(ノート)

概要

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Propylene carbonate in a concentration range from 10<SUP>-4</SUP>to 10<SUP>-3</SUP>mol has been analysed by two methods, alkalimetry and iodometry, base on its chemical properties that it is rapidly decomposed to propylene glycol and carbonate ion by excess of alkali. The limit of error of the alkalimetry was rather large, that is, (-) 6.0 to (+) 4.2%. After decomposition of propylene carbonate with alkali, the solution was treated with periodic acid in sulfuric acid solution, and then iodometry were performed by using sodium hyposulfite in acidic solution or by using arsenious acid in bicarbonate solutions; the limit of error of the former process was from (-) 2.2 to (+) 2.2%, and that of the later was from (-) 1.9 to (+) 0.4%.
社団法人日本分析化学会の論文