高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (2): 194.

• 研究简报 • 上一篇    下一篇

贵金属元素电化学分析研究(Ⅸ)--微量铑的阳极溶出伏安法测定

张玉祥1, 卢繁1, 段桂运1, 杨文秀2   

  1. 1. 兰州大学化学系;
    2. 西北矿冶研究院
  • 收稿日期:1987-06-09 出版日期:1989-02-24 发布日期:1989-02-24
  • 通讯作者: 张玉祥
  • 基金资助:

    国家自然科学基金

Studies on Electrochemical Analysis of Precious Metals (Ⅸ)--Determination of Micro-Rhodium by ASV

Zhang Yuxiang1, Lu Fan1, Duan Guiyun1, Yang Wenxiu2   

  1. 1. Department of Chemistry, Lanzhou University, Lanzou;
    2. North-West Research Institute of Mining & Metallurgy, Baiyin
  • Received:1987-06-09 Online:1989-02-24 Published:1989-02-24

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摘要： ShifrisB.J.等用伏安法在0.5mol/LHCl(含0.1mmol/LHg2+)支持电解质中,进行了Cu-Ni精矿中Rh、Ir的连续测定,但灵敏度较低,只能测至1μmol/L。作者曾用HgCl2-HCl-乙二胺体系测定Rh(Ⅲ),检出限为10ng。本文进一步发现铑离子在H2SO4-HgCl2介质中,具有稳定而尖锐的阳极溶出峰(见图1)。

关键词: 贵金属, 电化学分析, 铑, 阳极溶出伏安法

Abstract: We used the cation exchange resin as enrichment to separate rhodium which has been successfully determined in the samples. Anew and simple system of determinating Rh at a glass carbon electrode by anodic stripping voltammetry (ASV) was studied. The optimum supporting electrolytic system was 0.07mol·dm-3H2SO4-HgCl2.Between quantitative orders of Rh3+from 10-10g/m Lto 10-7g/mL, the concentration on peak current is linear. The detection limit reached 0.1ng. The coefficient variation are 0.0057% and 0.0058% respectively with samples of chloridized residue and refined mineral for 6 replicate determinations. Results obtained by this method quite agree with that of other methods. The industrial waste water and second nickel anode mud were also determined. Its coefficient variations were 0.0087% and 0.010% respectively.The recovery rate of chloridized residue was in the range of 93-106%.

Key words: Precious metal, Electrochemical analysis, Rhodium, Anodic stripping voltammetry

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