エレクトログラフ法によるカドミウム合金中のカドミウムおよびビスマス合金中のビスマスの定量

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タイトル別名
  • Electrographic Determination of Cadmium in Cadmium Alloys and of Bismuth in Bismuth Alloys
  • エレクトログラフホウ ニ ヨル カドミウム ゴウキン チュウ ノ カドミウム オヨビ ビスマス ゴウキン チュウ ノ ビスマス ノ テイリョウ

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抄録

Rapid quantitative determination of cadmium in cadmium alloys and of bismuth in bismuth-antimony alloys can be done by the combined electrographic-colorimetric method. For determining cadmium latent electrogram of alloys was developed into the Toyo filter paper No.50 moistened with 1 M NaNO3 by applying D.C. Voltage (4 V, 10 mA) across the filter paper for 10 sec.. After spraying 0.2% diphenylcarbohydrazid solution to the filter paper, absorbance of the colored complex was measured at 530 mμ. For the determination of bismuth almost the same procedure can be adopted except that 1.4×10−2 M KNO3 is used instead of 1 M NaNO3 as supporting electrolyte. 1% cinchonine solution in 2%KI was used for developing the color of bismuth-cinchonine complex. Spectrophotometric measurement was made at 500 mμ. Analytical precision (% standard deviation) are 3.0% for cadmium and 4.0% for bismuth determination.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (7), 333-337, 1963

    公益社団法人 日本金属学会

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