中华医学超声杂志

应用化学 ›› 1985, Vol. 0 ›› Issue (4): 20-25.

• 研究论文 • 上一篇    下一篇

蒽醌类染料的电分析化学研究和应用 Ⅱ.锆(Ⅳ)-THAQ中络合配位体THAQ的示波极谱行为研究

康乐, 张月霞   

  1. 冶金工业部钢铁研究总院
  • 收稿日期:1984-07-13 修回日期:1985-05-15 出版日期:1985-12-10 发布日期:1985-12-10

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

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摘要： 前文报导了锆(Ⅳ)在NaNO2酸性溶液处理过的THAQ-硼酸缓冲溶液中可以进行示波极谱定量测定。本文对THAQ在硼酸缓冲溶液中出现的各电流峰性质和NaNO2的作用等问题进行了较详细研究。经实验求算出参加THAQ电极反应的电子数和H+数。THAQ第三、第四级离解常数Ka3,Ka4分别为3.2×10-10和2.0×10-13。最后论证了THAQ和Zr(Ⅳ)-THAQ的电极反应机理。

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.

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