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中文摘要：
研究了用一次性丝网印刷膜片式微电极，通过阴极富集-阳极溶出差分脉冲伏安法测定水中Ph^2＋含量的方法。实验详细考察了电极预处理方式的选择；电极的使用次数、缓冲溶液浓度的确定；缓冲溶液的pH值、电压范围以及扫描速度对峰电流的影响；差分脉冲伏安法中各参数的选择等。实验结果表明：在pH=3．60的1．00×10^-4mol／L的醋酸-醋酸钾缓冲溶液中，-1．1V富集10s后，溶出峰电流与Pb^2＋浓度在0-1000μg/L范围内呈线性关系，相关系数r=0．9959；在实际样品测量中。回收率在89．9％～103％之间；相对标准偏差为4．84％。
英文摘要：
A method using cathode deposition-anode stripping differential pulse voltammetry for determination of trace Pb^2＋ in purified water with screen-printed electrodes used only once was described. Several factors effect such as pretreatment of electrodes, use times of screen-printed electrodes, concentration and pH of buffer solution, scan ranges and scan rates of cyclic voharnmetry, and other parameters of electrochemistry were discussed. The result showed that the calibration plot was linear in the range of 0 - 1000μg/L with regression coefficient of 0. 9959 under the optimal analytical conditions i. e. cathodic depositing 10 s at -1.1 V in pH = 3.60, 1.00 × 10^-4 mol/L acetic acid and potassium acetate buffer. The recovery of Pb^2＋ is between 89.9% and 103% for purified water in market, and the reahive standard deviation is4.8%.
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