ホルマリン中のホルムアルデヒドとメタノールの分別定量に関する考察

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  • Discussion about Fractional Determination of Formaldehyde and Methanol in Formalin

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On the fractional determination of formaldehyde and methanol in formalin, the fixed difference of methanol determination value yielded from a colorimetric analysis using chromotropic acid and a volumetric analysis using sodium sulfite adopted in the JIS K 1502.<BR>The former determination value of methanol in formalin was average 14. 0%, and the later was 8. 8%, respectively.<BR>The author therefore presumed that formaldehyde in formalin was responsible for giving effect on the oxidation reaction of methanol to formaldehyde in H3PO4-KMn04 solution. Formaldehyde is belong to the aldehyde compoundt. Addition of aldehyde compounds of acetaldehyde-ammonia ([CH3CH (NH2) OH] 3) made an increase in sensitivity on the determination of methanol with the conventional chromotropic acid method.<BR>The principle of the improved method was applicable to the det ermination of methanol and methylester in atmosphere using para-rosaniline.

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  • 大気汚染学会誌

    大気汚染学会誌 16 (3), 141-145, 1981

    公益社団法人 大気環境学会

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