Chinese Journal of Applied Chemistry ›› 1985, Vol. 0 ›› Issue (4): 20-25.

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STUDIES ON THE ELECTROANALYTICAL CHEMISTRY OF ANTHRAQUINONE DYES AND ITS APPLICATIONS Ⅱ.THE OSCILLOPOLAROGRAPHIC BEHAVIOUR OF THE LIGAND THAQ IN Zr(Ⅳ)-THAQ COMPLEX

Kang Le, Zhang Yuexia   

  1. Central Iron and Steel Research Institute, Ministry fo Metallurgical Industry, Beijing
  • Received:1984-07-13 Revised:1985-05-15 Published:1985-12-10 Online:1985-12-10

Abstract: Using the electrode reaction of the ligand THAQ in Zr(Ⅳ)-THAQ complex, as we have reported previously, zirconium(Ⅳ) could be determined quantitatively by oscillopolarography in THAQ (when pretreated with NaNO2)-borate buffer solution. In this paper a detail description of the properties of peak current of THAQ, the effect of NaNO2 and other factors are presented. The number of electrons and hydrogen ions involved in the electrode reaction of THAQ were estimated. The third and fourth order of dissociation constants of THAQ were calculated to be ka3=3.2×10-10 and ka4=2.0×10-13, respectively. The electrode reaction mechanism of THAQ and Zr(Ⅳ)-THAQ complex for the given system has been proposed.