Investigation on the Affection of Harmonic Potentials in AC Oscillographic Chronopotentiometry

Chem. J. Chinese Universities ›› 1996, Vol. 17 ›› Issue (12): 1851.

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Investigation on the Affection of Harmonic Potentials in AC Oscillographic Chronopotentiometry

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

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

Abstract

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:

QI Hong, TIAN Min, ZHENG Jian-Bin, YU Ke-Qi, GAO Hong. Investigation on the Affection of Harmonic Potentials in AC Oscillographic Chronopotentiometry[J]. Chem. J. Chinese Universities, 1996, 17(12): 1851.

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Investigation on the Affection of Harmonic Potentials in AC Oscillographic Chronopotentiometry

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