ヨウ素滴定によるN,N'-ジシクロヘキシルカルボジイミドの間接定量

概要

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An indirect method is described for the determination of N,N'-dicyclohexylcarbodiimide(DCC), which is based on the reaction of DCC with oxalic acid and the subsequent iodometric determination of the unreacted oxalic acid. The procedure is as follows: to a mixture of DCC (about 70 mg) and methylene chloride (25ml) in a 300-ml iodine-flask, add 10 ml of 1.0 w/v % oxalic acid and reflux in a water bath {(75〜80)℃} for 30 min. After cooling to room temperature, add 10ml each of 10w/v% potassium iodide, 10 w/v % barium chloride, and 0.1 M potassium iodate, and 100 ml of distilled water. After 10 min, titrate the iodine liberated with 0.1 N sodium thiosulfate. The coefficient of variation was (0.10〜0.32)%.
社団法人日本分析化学会の論文
1981-08-05