期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 170, 期 2-3, 页码 590-594出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2009.05.024
关键词
Square wave voltammetry; Kaolin; Platinum; Cadmium
In this work, determination of cadmium(II) using square wave voltammetry (SWV) was described. The method is based on accumulation of these metal ions on kaolin platinum electrode (K/Pt). The K/Pt performance was optimized with respect to the surface modification and operating conditions. The optimized conditions were obtained in pH of 5.0 and accumulation time of 25 min. Under the optimal conditions, the relationship between the peak current versus concentration was linear over the range of 9 x 10(-8) to 8.3 x 10(-6) mol L-1. The detection limit (DL, 3 sigma) was 5.4 x 10(-9) mol L-1. The analytical methodology was successfully applied to monitor the Cd(II) content in natural water. Interferences were also evaluated. (C) 2009 Elsevier B.V. All rights reserved.
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