高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (12): 1851.

• 论文 • 上一篇    下一篇

交流示波计时电位法中高次谐波电位的研究

祁洪1, 田敏2, 郑建斌2, 于科岐2, 高鸿2   

  1. 1. 南京大学化学系, 南京, 210093;
    2. 西北大学化学系电分析化学研究所, 西安, 710069
  • 收稿日期:1996-01-17 出版日期:1996-12-24 发布日期:1996-12-24
  • 通讯作者: 田敏
  • 作者简介:祁洪,男,33岁,副教授.
  • 基金资助:

    国家自然科学基金

Investigation on the Affection of Harmonic Potentials in AC Oscillographic Chronopotentiometry

QI Hong1, TIAN Min2, ZHENG Jian-Bin2, YU Ke-Qi2, GAO Hong2   

  1. 1. Department of Chemistry, Nanjing University, Nanjing, 210093;
    2. Institute of Electroanalytical Chemistry, Department of Chemistry, Nothwest University, Xi'an, 710069
  • Received:1996-01-17 Online:1996-12-24 Published:1996-12-24

摘要: 用计算机模数转换和快速傅里叶变换技术,研究了微金电极上电位-时间曲线和频率响应关系,提出了利用高次谐波电位进行交流示波计时电位研究的新方法,扣除了交流示波极谱图中的充电电流和高频噪声,提高了示波极谱分析的信噪比。

关键词: 示波计时电位法, 信号处理, 快速傅里叶变换, 微电极

Abstract: Anew method for the investigation of harmonic potentials in ACoscillographic chronopotentiometry is suggested.The computer sampling and fast Fourier transform(FFT)are used.The potential-time curve and its frequency response for Cd2+ are investigated at a gold microelectrode.The sensitivity of the method for Cd2+ is improved, and a good linear relationship between peak height and concentration of Cd2+ is obtained(correlation coefficient is 0.9945).Some approaches for eliminating charging current and high frequency noises are discussed.

Key words: Oscillographic chronopotentiometry, Signal process, FFT analysis, Microelectrode

TrendMD: