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本文用玻碳电极为基体制成了8-羟基喹啉修饰电极,研究了铊在该电极上的阴极溶出伏安特性,并用于痕量铊的测定。在5.0×10~(-10)～1.0×10~(-8)M Tl(I)的浓度范围内与峰高呈良好的线性关系。对电极作用的机理进行了分析探讨,认为电极性能的改进主要是由电极表面的络合吸附性能决定的。
In this paper, 8-hydroxyquinoline modified electrode was prepared by using glassy carbon electrode as substrate. The cathodic stripping voltammetry of thallium was studied and the determination of trace thallium was carried out. In the concentration range of 5.0 × 10 -10 ~ 1.0 × 10 -8 M Tl (I), there is a good linear relationship with the peak height. The mechanism of electrode action was analyzed and discussed. It is considered that the improvement of electrode performance is mainly determined by the complex adsorption performance of the electrode surface.