硅油-碳糊电极上微分脉冲伏安法测定痕量铅  

Determination of Trace Lead in Waste Water by Differential Pule Voltammetry with Silicone Oil Carbon Paste Electrode

作　　者：陈庆阳[1] 张月秋[1] 林丹[1] 朱永春[1] 

机构地区：[1]辽宁省高校生物系统进化与农业生态重点实验室沈阳师范大学化学与生命科学学院化学系,沈阳市110034

出　　处：《光谱实验室》2005年第6期1314-1318,共5页Chinese Journal of Spectroscopy Laboratory

摘　　要：研究了铅在盐酸体系中硅油-碳糊电极上的电化学行为,考察了酸度、富集时间、共存干扰离子的影响,在0.03—8.0μmol/L浓度范围内,铅离子的浓度对阳极峰电流呈很好的线性关系,回归方程为:iP(μA)=-3.568+17.75C(μmol/L),r=0.99987,SD=0.9216,检测限为:0.0085μmol/L(1.7ppb),用于实际湖水样品测定,结果令人满意。The electrochemical behavior of lead at silicone-graphite carbon paste electrode in pH 1.0 HCl solution was investigated by cyclic voltammetry. The influences of pH,enrich time and interference of common ions were also studied. A good linear relation between lead concentration and anodic peak current in DPV was obtained in the range of0. 03-8.0μmol/L with regression equation of ip（μA）= 3. 568＋17. 75μmol/L）, （r=0. 99987,SD=0. 9216） and detection limit of 0. 0085μmol/L（1.7ppb）. The method is simple,convenient and fast,and was applied to the determination of trace lead ion in waste water with satisfactory results.

关 键 词：铅离子 硅油 石墨粉-环氧树脂固态电极 微分脉冲伏安法 化学修饰电极 

分 类 号：O657.14[理学—分析化学]