高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (7): 988.

• 研究简报 • 上一篇    下一篇

选相示波伏安法

毕树平, 都思丹, 高鸿   

  1. 南京大学化学系, 210008
  • 收稿日期:1993-07-20 修回日期:1994-01-03 出版日期:1994-07-24 发布日期:1994-07-24
  • 通讯作者: 毕树平,男,33岁,博士,副教授.
  • 作者简介:毕树平,男,33岁,博士,副教授.
  • 基金资助:

    国家自然科学基金

Phase-Selective A.C.Oscillovoltammetry

BI Shu-Ping, DU Si-Dan, GAO Hong   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1993-07-20 Revised:1994-01-03 Online:1994-07-24 Published:1994-07-24

关键词: 示波计时电位法, 选相示波伏安法, 切口

Abstract: Anew electrochemistry method, phase-selective a.c.oscillovoltammetry, was developed in this paper.With the aid of the home-built instrument constructed by operational amplifiers, a reverse ladder-shape voltage was superposed onto the original dE/dt-t curve, therefore an oscillovoltammogram“if-E”was obtained, By selecting a suitable phase-angle between the ladder-shape voltage and the dE/dt-t curve, the incision on“dE/dt-E”oscillogram can be converted into a sharp peak on“if-E”curve.Experimental results showed that the peak height is a function of depolarizer concentration over a limited range of concentrations.The detection limit is 10-6 mol/L, which is much better than that of“dE/dt-E”.

Key words: A.C.Oscillochronopotentiometry, Phase-selective oscillovoltammetry, Incision

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