Quantitative analysis of cadmium(II) and copper(II) by chemical stripping chronopotentiometry using dissolved oxygen as an oxidant

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  • TATSUMI Kenji
    Department of Chemistry, Faculty of Science, Osaka University
  • OGAWA Nobuaki
    Department of Chemistry, Faculty of Science, Osaka University
  • WATANABE Iwao
    Department of Chemistry, Faculty of Science, Osaka University
  • IKEDA Shigero
    Department of Chemistry, Faculty of Science, Osaka University

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Other Title
  • 酸化剤として溶存酸素を用いた化学溶出クロノポテンショメトリーによるカドミウム（ＩＩ）及び銅（ＩＩ）の定量分析
  • サンカザイ ト シテ ヨウゾン サンソ オ モチイタ カガク ヨウシュツ クロ

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Abstract

Chemical stripping chronopotentiometry was applied to determine cadmium(II) and copper(II) by using oxygen as an oxidant. The calibration curve for cadmium(II) was linear within a range of (10-610-4) mol dm-3, while the calibration curve for copper(II) was distorted, since copper(II) ion in the sample solution also worked as an oxidant. The calibration curve for cadmium(II) in the presence of constant concentration of copper(II) ion was linear within the range of (10-52×10-4) mol dm-3. In order to determine copper(II) in the presence of cadmium(II), it was necessary to electrodeposit only copper by re ducing at -0.5V vs. SCE. The instrumentation used in this work was composed of only a simple voltage supply circuit, a stirrer, a y-t recorder and a pH-meter used as a high-impedance potentiometer.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 32 (3), 154-158, 1983

    The Japan Society for Analytical Chemistry

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