<Data>Discussion on Experiments of Analytical Chemistry for Students. IV. : Iodometry of Formaldehyde in Formalin

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  • <資料>分析化学の学生実習に関する考察(第4報) : ホルマリン中のホルムアルデヒドの定量

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It is very important that the proper order of reagent addition should be followed in the determination of formaldehyde in formalin by iodometry. Formaldehyde is oxidized to formic acid by hypoiodate ions in an alkaline medium. This reaction competes with the rapid transfer of hypoiodate ions to iodate ions in this medium. Quantitative determination is thus not possible when the right order of reagent is not followed.

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