Acta Phys. -Chim. Sin. ›› 1988, Vol. 4 ›› Issue (01): 84-87.doi: 10.3866/PKU.WHXB19880117

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INVESTIGATION OF CHEMICAL OSCILLAITION BY THE METHOD OF CYCLIC VOLTAMMETRY

Lu Hong; Han Degang; Lin Qiuzhu; Zheng Kexiang; Gao Zhidi   

  1. Department of Chemistry; Peking University
  • Received:1986-08-22 Revised:1987-04-27 Published:1988-02-15
  • Contact: Han Degang

Abstract: Method of cyclic voltammetry for static systems has been modified through its recording system in order to apply it to follow the oscillating change of concentrations of some species in a chemical oscillation reaction. In this paper, oscillation of the concentration of bromide-ion in Melonic-acid-KBrO_2-H_2SO_4-MnSO_4 systems was followed by this modified method. It was found that, for systems investigated in this paper, the bromide-ion concentrations oscillate in the range of IO~(-4) mol dm~(-3) which is 1-2 orders of magnitude higher than that observed by the bromide-ion selective electrode. A frozen-titration method for bromide-ion was also used to check the result which was found to be in agreement with that of the modified method.