高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (4): 414.

• 研究简报 • 上一篇    下一篇

三正辛胺修饰电极伏安测定痕量金的研究

施清照, 洪建军, 吕荣山, 马国强, 周英   

  1. 杭州大学化学系
  • 收稿日期:1988-09-06 出版日期:1990-04-24 发布日期:1990-04-24
  • 通讯作者: 施清照

Studies on Voltammetry Determinatibn of Trace Amount of Gold by Tri-n-Octylamine Modified Electrode

Shi Qingzhao, Hong Jianjun, Lu Rongshan, Ma Guoqiang, Zhou Ying   

  1. Department of Chemistry, Hangzhou University, Hangzhou
  • Received:1988-09-06 Online:1990-04-24 Published:1990-04-24

PDF (PC)

被引次数

13

摘要： 用化学修饰电极伏安测定痕量金,KalcherK等曾采用阴离子交换剂碳糊修饰电极及打萨宗碳糊修饰电极检测100～300μg/L的金。本文采用三正辛胺(TOA)修饰玻碳电极,在1.5mol/L介质中,Au(Ⅲ)在+0.16V(vsSCE)处有一灵敏的不可逆还原峰。检出限为0.1μg/L。灵敏度比文献方法高千倍。

关键词: 修饰电极, 伏安法, 金, 三正辛胺

Abstract: The determination of trace amount gold( Ⅲ ) with tri-n-octylamine as the modified glassy carbon electrode in1.5 mol/Lhydrochloric acid medium by cathodic voltammetry is presented. Ahighly sensitive irreversible reduction peak was obtained at potential +0. 16V(vs SCE). Alinear relationship between the peak height and concentration in the range of 5× 10-7-5× 10-9 mol/Lof gold was observed. The detection limit was found to be about 0.1 μg/mL (3-min preconcentration). This method is applied to measure the trace amount of gold in anode mud and the results are satisfied, with the coefficient of variation 6.42%(at 26 ppb level) and the percentage of recovery 95%-101 %.

Key words: Modified electrode, Voltammetry, Gold, Tri-n-octylamine

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