高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (7): 898.

• 论文 • 上一篇    下一篇

化学修饰电极富集石墨炉原子吸收法测定痕量金

任玉林, 邹明珠, 郑衍生, 郭晓梅, 牛淑云, 刘晓勋   

  1. 吉林大学化学系, 长春, 130023
  • 收稿日期:1991-06-10 出版日期:1992-07-24 发布日期:1992-07-24
  • 通讯作者: 任玉林

Determination of Trace Gold by Graphite Furnace Atomic Absorption Spectrophotometry with Preconcentration by Chemically Modified Electrode

REN Yu-lin, ZOU Ming-zhu, ZHENG Yan-sheng, GUO Xiao-mei, NIU Shu-yun, LIU Xiao-xun   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1991-06-10 Online:1992-07-24 Published:1992-07-24

摘要: 本文提出用聚丙烯脒硫氰酸盐化学修饰石墨管内壁、电化学预富集石墨炉原予吸收测定Au的分析方法.分析灵敏度提高100倍.应用于矿石中痕量Au的测定,获得了满意的结果.

关键词: 金, 石墨炉, 化学修饰电极

Abstract: The inside wall of a graphite tube was modified with a thin film of polyacrylamidine thiocyanate.Trace gold was electrochemically preconcentrated by the graphite tube being soaked in its solution and then the determination of trace gold by graphite furnace atomic absorption spectrophotometry was carried out.It was shown experimentally that Ag,Ir, Rh, Pd and Ft did not interfere in the determination of Au, and a hundred fold enhancement in analytical sensitivity was found.The analytical sensitivity of the method (1% absorption) was 3.5×10-10 mol/L.The method was applied to the determination of trace gold in ore with a satisfactory result.

Key words: Gold, Graphite furnace, Chemically modified electrode

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