Determination of Antimony in Steel by Differential Pulse Anodic Stripping Voltammetry at a Rotating Gold Film Electrode

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A simple and rapid procedure is presented for the reliable determination of antimony in steel based on differential pulse anodic stripping voltammetry without any removal of iron matrix. Optimum conditions included a supporting electrolyte of 0.1 mol dm-3 nitric acid-0.1 mol dm-3 sulfuric acid, a pre-electrolysis of -0.5 V vs. the saturated calomel electrode for 300 s at a rotating gold film electrode, and subsequent stripping of the deposit on the electrode surface by a positive going potential scan at a rate of 40 mV s-1. Antimony(V) was chemically reduced to antimony(III) by potassium iodide prior to voltammetric measurements. The interference of iron(III) was eliminated by simultaneously reducing it to iron(II) with the iodide. The generated iodine was reduced with <font size=-2>L</font>(+)-ascorbic acid. Arsenic(III), bismuth(III) and copper(II) interfered with the antimony determination severely. The proposed method has been successfully applied to the determination of antimony at the µg g-1 level in steels within 50 min without any troublesome preconcentration steps using harmful chemicals. The detection limit (3σ) with a deposition time of 300 s was 0.19 ng cm-3 (1.6×10-9 mol dm-3).

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 16(1), 19-23, 2000-01-10

    社団法人 日本分析化学会

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各種コード

  • NII論文ID(NAID)
    10004704519
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    4966579
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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