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用循环伏安法研究了Sn2+在金盘电极上的欠电位沉积.在特别提纯的1mol/LHCl支持电解质溶液中,Sn2+在金盘电极上可以产生清晰的欠电位沉积峰和本体沉积峰.基于Au/Sn欠电位体系优良的电化学特性,发展了一种选择性好、灵敏度高的电化学分析方法.Sn2+浓度在1.96×10-10-2.91×10-8mol/L范围内与峰电流有线性关系.连续7次测定1.0x10-9mol/LSn2+得到的相对标准偏差为5.06%.该方法已用于实际样品的测定,所得结果与原子发射光谱(ICP-AES)所得数据相吻合.
Cyclic voltammetry was used to study the underpotential deposition of Sn2 + on the gold plate electrode. In the specially purified 1 mol / LHCl support electrolyte solution, Sn2 + can produce clear underpotential and bulk deposition peaks on the gold plate electrode. Au / Sn underpotential system electrochemical properties, the development of a good selectivity, high sensitivity electrochemical analysis method.Sn2 + concentration in the range of 1.96 × 10-10-2.91 × 10-8mol / L with the peak current of The relative standard deviation (RSD) was 5.06% for seven consecutive determinations of 1.0 × 10-9 mol / L Zn2 +. This method has been applied to the determination of real samples and the results are in good agreement with the data obtained by atomic emission spectrometry (ICP-AES).