電流滴定法によるジチオカルバミン酸塩の迅速定量

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タイトル別名
  • 回転白金電極を指示電極とする電流滴定法　ＸＸＸＩＩＩ　　電流滴定法によるジチオカルバミン酸塩の迅速定量
  • Rapid determination of dithiocarbamate by amperometric titration
  • デンリュウ テキテイホウ ニヨル ジチオカルバミンサンエン ノ ジンソク テイ
  • 回転白金電極を指示電極とする電流滴定法に関する分析化学的研究(第33報)

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An amperometric method for the rapid determination of five kinds of dithiocarbamate has been studied with use of a rotating platinum wire electrode (1200 rpm) at the potential of +0.7 V vs. mercury-mercury (II) iodide electrode.<BR>It was found that water-soluble dithiocarbamate could be titrated at room temperature with silver nitrate standard solution by measuring the oxidation current of dithiocarbamate in the presence of Triton X-100, ammonia and ammonium acetate. Ammonium acetate or ammonium carbonate was suitable for the supporting electrolyte.<BR>Sodium diethyldithiocarbamate and diethylammonium diethyldithiocarbamate could be precisely determined at their concentrations from 0.00002 M to 0.004 M. The precisest determination was testified in the concentration range of (0.00020.004) M; both the relative error (r.e.) and coefficient of variation (c.v.) being about 0.2%.<BR>Ammonium pyrolidine-N-dithiocarbamate was determined with the r.e. and c.v. of about 0.2% at its concentrations from 0.0004 M to 0.004 M.<BR>Sodium dimethyldithiocarbamate and dimethylammonium dimethyldithiocarbamate were determined with the r.e. and c.v. of about 0.4% at their concentrations from 0.002 M to 0.004 M.<BR>The recommended procedure is as follows.<BR>Measure (1020) mg of dithiocarbamate into the titration cell. After the addition of ammonia, ammonium acetate and Triton X-100 so that the final concentrations may be 0.1 M, 0.1 M and 0.1%, respectively, add water to bring the volume to 50 ml.<BR>Titrate the solution with 0.1 M silver nitrate solution amperometrically.<BR>The whole procedure requires only 10 minutes.

収録刊行物

  • 分析化学

    分析化学 25 (9), 611-615, 1976

    公益社団法人 日本分析化学会

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