高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (2): 125.

• 研究简报 • 上一篇    下一篇

贵金属元素电分析化学研究(Ⅶ)--CCX富集、分离-阳极溶出伏安法测定金

张玉祥, 卢繁   

  1. 兰州大学
  • 收稿日期:1985-11-28 出版日期:1987-02-24 发布日期:1987-02-24

Electrochemical Studies on Precious Metal Elements (Ⅶ)--CCx Enrichment and Separation-Determination of Gold

Zhang Yuxiang, Lu Fan   

  1. Lanzhou University, Lanzhou
  • Received:1985-11-28 Online:1987-02-24 Published:1987-02-24

摘要: 阳极溶出伏安法(ASV)测定金,多采用石墨电极,碳糊电极和玻碳电极。除后者有较高灵敏度外,多数非但处理电极较麻烦,而且常需采用活性炭吸附或萃取分离等手续,如此诸多不便。作者曾用巯基棉选择富集后,在0.36M柠檬酸钠+0.5MNaCl+7.5×10-6MHg(Ⅱ)(pH=5.4)支持电解质中,用玻碳电极ASV同时测定了贵金属样中的Au和Pd。

Abstract: The conditions of the determination of gold were studied on glass carbon electrode by the anodic stripping voltammetry(ASV).The experiments showed that in the optimum electrolytic system of 0.lM HCl-1.4×10-6M HgCl2, there was a stable stripping peak for Au at about + 0.8V (vs. S.C.E). Its determination limit reached 5 ppb. By adopting of cotton cellulose xanthate (CCX) for entichment, the separation of Au achieved good results.This method was used for some practical sample analyses with good results. The coefficient variation was 0.73% and 2.53% respectively when two gold samples were repeatedly determined for 7 times.

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