Sensitive Determination of Trace Pb2+ in Seawater Using Columnar Glassy Carbon Electrode

文献类型： 外文期刊

第一作者： Zhang, Xuzhi

作者： Zhang, Xuzhi;Ma, Shaosai;Cui, Zhengguo;Chen, Jufa;Cui, Yi;Zhao, Jun;Feng, Xiaohua

作者机构：

关键词： Columnar glassy carbon electrode;Lead;Differential pulse stripping voltammetry;Environmental monitoring

期刊名称：JOURNAL OF THE CHINESE CHEMICAL SOCIETY （ 影响因子：1.967； 五年影响因子：1.639 ）

ISSN： 0009-4536

年卷期： 2011 年 58 卷 5 期

页码：

收录情况： SCI

摘要： We herein report a mercury-free approach for the sensitive determination of trace Pb2+ in seawater using differential pulse stripping voltammetric (DPSV) method with a novel columnar glassy carbon electrode (CGCE). Compared with the conventional disk glassy carbon electrode with the same diameter, it has much larger electrochemical area (0.627 +/- 0.003 cm(2)). The CGCE shows good accumulation ability and consequently acceptable behavior which makes it suitable as a working electrode in the DPSV determination of Pb2+ with the great advantage of the avoidance of harmful mercury. Using acidified artificial seawater as supporting electrolyte, there was a good linear relationship between the peak currents and the concentration of Pb2+ in the range of 0.6 similar to 140.0 mu g L-1 with a detection limit of 0.3 mu g/L (S/N = 3) when the accumulation time was 300 s. The method was employed to determine trace levels of Pb2+ in real seawater samples successfully.

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