Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (5): 604.

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Frequency-Spectrum Analysis of Oscillopolarogram

Bi Shu-ping, Qi Hong, Du Si-dan, Gao Hong   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1989-10-28 Online:1991-05-24 Published:1991-05-24

Abstract: Application of frequency-spectrum analysis to oscillopolarogram using Fourier transformation technique is given in this paper. Harmonic equations of E-t curve of the supporting electrolyte are given. Theoretical conclusions are confirmed by experimental results. The Faradic rectification is also explained.The frequency-spectrum can be used in analysis. The second and third harmonic potentials can be used to determine the concentration of the depolarizer. The lowest concentration determined is 1 × 10-6mol/L. The method is more sensitive than the conventional one and the precision is also better. THe factors influencing the frequency-spectrum are studied. The influence of dissolved oxygen on ordinary oscillopolarogram is not obvious but its effect can be seen easily in the frequency-spectrum analysis.

Key words: a. c. Oscillopolarogram, Frequency-spectrum analysis, Fourier transformation

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