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本文应用循环伏安、直流和交流极谱等多种手段研究了稀土的一种络合剂——漂蓝6 B在汞电极上的极谱性质。指出在可与稀土离子发生络合的介质条件下,低浓度漂蓝6 B的电极反应具有以下三个特性:(1)第一步电极反应的可逆性和第二步电极反应的不可逆性;(2)吸附性。求算了漂蓝6 B在汞电极上的吸附量、吸附系数、吸附自由能等参数;(3)二聚性。用实验论证了第一步电极反应产物可以发生随后二聚反应,并求出了二聚反应的速率常数。
In this paper, cyclic voltammetry, DC and AC polarography and other means to study a rare earth complexing agent - bleaching blue 6 B mercury electrode polarographic properties. It is pointed out that the electrode reaction of low concentration BS4B has the following three properties under the condition of complexing with rare earth ions: (1) the reversibility of the first electrode reaction and the irreversibility of the second electrode reaction; (2) Adsorption. The adsorption amount, adsorption coefficient, adsorption free energy and other parameters of bleaching blue 6 B on the mercury electrode were calculated. (3) Dimerization. Experiments show that the first step of the electrode reaction product can occur after the dimerization reaction, and obtained the dimerization reaction rate constant.