期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 660, 期 1, 页码 209-216出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2011.07.001
关键词
Cadmium(II); Mercury(II); Carbon nanotubes; Cross-linked chitosan; Anodic stripping voltammetry; Glutaraldehyde
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [Proc. 2006/05146-0, 2008/09893-0, 2008/07529-9]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
A functionalized carbon nanotubes paste electrode modified with cross-linked chitosan for the determination of trace amounts of cadmium(II) and mercury(II) by linear anodic stripping voltammetry is described. Under optimal experimental conditions, the peak current was linear in the Cd(II) concentration range from 5.9 x 10(-8) to 1.5 x 10(-6) mol L(-1) with a detection limit of 9.8 x 10(-9) mol L(-1) and, for Hg(II) from 6.7 x 10(-9) to 8.3 x 10(-8) mol L(-1) with a detection limit of 2.4 x 10(-9) mol L(-1). The proposed method was successfully applied for the determination of Hg(II) in natural and industrial wastewater samples. and Cd(II) in sediments, human urine, natural, and industrial wastewater samples. (C) 2011 Elsevier B.V. All rights reserved.
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