【摘要】 在pH 4.2的柠檬酸盐缓冲溶液中，铜（Ⅱ）与茜素S形成的配合物在-0.43 V处产生吸附波，加入过硫酸钾后该波峰电流升高，其二阶导数峰电流与铜（Ⅱ）浓度在5.0×10^-9～1.0×10^-6 mol·L^-1范围内呈线性关系，检出限（3s/N）为1.0×10^-9 mol·L^-1.研究了极谱波的性质及增敏机理，表明该波为配合物吸附催化波.方法用于环境水样中铜含量的测定，测定值与原子吸收光谱法测定结果相符，方法的回收率在96.7%～105.0%之间.更多还原

【Abstract】 In a citrate buffer solution of pH 4.2, the complex formed between Cu（Ⅱ） and alizarin red S gave an adsorptive polarographic wave at the peak potential-0.43 V（vs. SCE）, the peak current of which was increased upon the addition of K₂S₂O₈, Values of 2 nd derivative of peak current were found to keep linear relationship with the concentration of Cu（Ⅱ） in the range of 5.0×10^-9～1.0×10^-6 mol·L^-1, with its detection limit（3s/N） of 1.0×10^-9 mol·L^-1. The adsorptive and catalytic properties of polarographic wave were proved by results of electrochemical study. The proposed method was used in the analysis of natural water sample for its Cu（Ⅱ） content. Giving results in consistency with that by AAS. Tests for recovery were carried out by addition of Cu（Ⅱ） standard solution to the sample as matrix, values of recovery found were ranged from 96.7% to 105.0%.更多还原