ポリ醋酸ビニール中の残存モノマーの定量法

概要

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The fact that esters of monobasic aliphatic acid and hydroxylamine hydrochloride give hydroxamic acid and the coloration of this compound by the formation of a complex salt with Fe<SUP>3+</SUP> is applied for the determination. But as, polyvinyl acetate gives the same coloration by the same procedure, the sample in toluene is extracted with petroleum ether. The extract is heated with alcoholic alkali and alcoholic solution of hydroxylamine. Development of coloration is made by addition of alcoholic conditions for coloration are investigated and found a suitable condition for obtaining reproducible solution of Fe<SUP>3+</SUP> The conditions for coloration are investigated and found a suitable condition for obtaining reproducible result. Application of this method on the determination of the monomer contained in powdered emulsion polymer gives far smaller value compared with the result of estimation by heretofore known method of solution and precipitation and the cause of errors by the latter method is pointed out.
社団法人日本分析化学会の論文