高等学校化学学报

高等学校化学学报 ›› 1986, Vol. 7 ›› Issue (1): 15.

• 研究论文 • 上一篇    下一篇

铝-邻苯二酚紫络合吸附波的研究

李启隆, 邢京娜   

  1. 北京师范大学化学系
  • 收稿日期:1984-07-30 出版日期:1986-01-24 发布日期:1986-01-24

Study on Adsorptive Complex Wave of Aluminium-Pyrocatechol

Li Qilong, Xing Jingna   

  1. Department of Chemistry, Beijing Normal University, Beijing
  • Received:1984-07-30 Online:1986-01-24 Published:1986-01-24

PDF (PC)

被引次数

28

摘要： 邻苯二酚紫在NH4Ac(pH4.7)底液中还原,产生良好的示波极谱图,Ep1=-0.66V(vs.SCE).加入A13+后,此波高降低,并在稍负的电位上出现一个尖峰形的新波(EP2=-0.85V),其峰电流与铝的浓度在1×10-6-1.2×10-5M范围成正比,此波可用于测定铝,实验表明,该波属于络合吸附波,用连续变化法确定络合物的络合比为1:1。

Abstract: In a supporting electrolyte containing 3.5·10-5Mpyrocatechol, 0.015 NH4Ac and at pH 4.7, an adsorptive complex wave of aluminium-pyrocatechol was obtained by single-sweep polarography. The peak potential of the polarographic wave was -0.85V (vs, SCE). The linear relationship between wave height and concentration of Al+3 held in the range of 1 ·10-6- 1. 2·10-5M.The composition of the complex in the ratio 1:1 was determined. This wave was proved to be an adsorptive wave by several experiments. The mechanism of the electrode reaction was discussed.

TrendMD: