高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (12): 1290.

• 论文 • 上一篇    下一篇

贵金属元素电化学分析研究(Ⅷ)——痕量铂的阳极溶出伏安法测定

张玉祥1, 卢繁1, 张至德2   

  1. 1. 兰州大学化学系;
    2. 贵州省冶金设计研究院
  • 收稿日期:1987-06-09 出版日期:1988-12-24 发布日期:1988-12-24
  • 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(Ⅷ) --Determination of Trace-Platinum by ASV

Zhang Yuxiang1, Lu Fan1, Zhang Zhide2   

  1. 1. Department of Chemistry, Lanzhou Vnisersity, Lanzhou;
    2. Metallurgy Institute of Guizhou Province, Guiyang
  • Received:1987-06-09 Online:1988-12-24 Published:1988-12-24

摘要: 用伏安法或石墨电极阳极氧化伏安法测定痕量铂虽有报道[1~2],但其灵敏度均不够高。Ghulkina等[3]发现在HCl介质中含Sn(Ⅳ)或Sn(Ⅱ),以Pt-Sn共沉淀在碳糊电极上,使铂的测定限达5×10-9g/L。本文用0.3mol/LH2SO4-Hg(Ⅱ)-3.0×10-4mol/LKMnO4体系测Pt,其检测限为0.5μg/L。探讨了利用黄原酸钠纤维素酯(CCX)[4~5]分离除去试液中Au3+Pd2+等干扰元素。本法已用于实际样品分析,结果较好。

关键词: 贵金属, 铂, 阳极溶出安伏法

Abstract: A new method of determination of trace-platinum by anodic stripping voltammetry (ASV) has been established. By using the cotton cellulose xanthate (CCX) separation column to separate the main impurities of Au3+, Pd2+, etc, the filtrate of sample was treated by aqua regia and controlled in the optimun supporting electrolysis system of 0.3mol·L-1H2SO4-Hg(Ⅱ)-3.0 × 10-4mol·L-1 KMnO4 for the purpose. The detection limit of Pt was 0.5ppb. The method was applied to the determination of platinum in several complicated samples, such as industrial waste water, refined mineral and chloridized residue. Its coefficient variations were 0.086, 0.041 and 0.027 respectively. The recovery of platinum in industrial waste water was in the range of 92~104%.

Key words: Precious metal, Platinum, Anodic stripping voltammetry

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