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Citation: Kang Le, Zhang Yuexia. STUDIES ON THE ELECTROANALYTICAL CHEMISTRY OF ANTHRAQUINONE DYES AND ITS APPLICATIONS Ⅱ.THE OSCILLOPOLAROGRAPHIC BEHAVIOUR OF THE LIGAND THAQ IN Zr(Ⅳ)-THAQ COMPLEX[J]. Chinese Journal of Applied Chemistry, ;1985, 2(4): 20-25. shu

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 of Metallurgical Industry, Beijing

Corresponding author: Zhang Yuexia,
Received Date: 13 July 1984
Available Online: 15 May 1985

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 oscillop-olarography 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 k_a3=3.2×10^-10 and k_a4=2.0×10^-13, respectively. The electrode reaction mechanism of THAQ and Zr(Ⅳ)-THAQ complex for the given system has been proposed.
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