期刊
TALANTA
卷 155, 期 -, 页码 8-13出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2016.04.011
关键词
Peptide-modified sensors; Electrochemical grafting; Screen-printed electrodes; Metal determination; Stripping voltammetry; Glutathione
资金
- Ministry of Economy and Competitiveness [CTQ2012-32863]
- Generalitat of Catalonia [2014SGR269]
- Generalitat of Catalonia
This work reports the development of a glutathione modified electrode via electrografting on a screen printed carbon nanofiber substrate (GSH-SPCNFE). GSH-SPCNFE was compared to a classical screen printed carbon electrode modified with glutathione (GSH-SPCE) for the simultaneous voltammetric determination of Cd(II) and Pb(II). Their electrochemical characterization and analytical performance suggest that SPCNFE could be a much better support for GSH immobilization. The applicability of GSH-SPCNFE for the determination of low concentration levels of Pb(II) and Cd(II) ions in environmental samples was successfully tested in a certified wastewater reference material by means of stripping voltammetry with a very high reproducibility and good trueness. (C) 2016 Elsevier B.V. All rights reserved.
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