チオシアン酸カリウム-1-フェニル-3-メチル-5-ピラゾロンを用いるピリジンの吸光光度定量法

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タイトル別名
  • チオシアン酸カリウム‐１‐フェニル‐３‐メチル‐５‐ピラゾロンを用いるピリジンの吸光光度定量法
  • Spectrophotometric determination of pyridine with potassium thiocyanate-1-phenyl-3-methy1-5-pyrazolone
  • チオシアンサン カリウム -1 フェニルー3 メチルー5 ピラゾロン オ モチ

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説明

A spectrophotometric determination of pyridine using nonpoisonous potassium thiocyanate instead of toxic potassium cyanide has been deviced. The recommended procedure was as follows.<BR>To 1.0 ml of potassium thiocyanate solution (SCN 70 ppm), 2.0 ml of chloramine T solution (0.08 w/v% in 0.043 M phosphate buffer, pH 6.4) was added. The mixture was kept for 15 minutes in a water bath at 50°C. To this solution each one ml of the neutral sample solution containing pyridine and the 1-phenyl-3-methyl-5-pyrazolone solution (0.1 w/v% in 4 v/v% ethylen glycol monomethyl ether) was added, and the resultant solution was allowed to stand for 45 minutes at 50°C. After cooling in water, the absorbance was measured at 610 nm against a reagent blank. The calibration curve followed the Beer's law in the range of 07 ppm of pyridine in sample solutions. The coefficient of variation is about 0.7% at 6 ppm pyridine. The influence with diverse compounds on the determination were examined.

収録刊行物

  • 分析化学

    分析化学 24 (6), 383-385, 1975

    公益社団法人 日本分析化学会

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