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Full Paper
Bismuth Film Electrode in Metal Complexation Studies: Stripping Analysis of the Pb(II)-, Cd(II)-, and Zn(II)-Binding with Phthalate
Article first published online: 22 JAN 2009
DOI: 10.1002/elan.200804417
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Issue
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Electroanalysis
Special Issue: The 12th International Conference on Electroanalysis, ESEAC 2008
Volume 21, Issue 3-5, pages 431–438, February 2009
Additional Information
How to Cite
Serrano, N., Martín, N., Díaz-Cruz, J., Ariño, C. and Esteban, M. (2009), Bismuth Film Electrode in Metal Complexation Studies: Stripping Analysis of the Pb(II)-, Cd(II)-, and Zn(II)-Binding with Phthalate. Electroanalysis, 21: 431–438. doi: 10.1002/elan.200804417
Publication History
- Issue published online: 12 FEB 2009
- Article first published online: 22 JAN 2009
- Manuscript Accepted: 19 SEP 2008
- Manuscript Received: 9 JUL 2008
- Abstract
- References
- Cited By
Keywords:
- Stripping chronopotentiometry (SCP);
- Anodic stripping voltammetry (ASV);
- Bismuth film electrode (BiFE);
- Signal splitting;
- Heavy metal speciation
Abstract
The possibilities of bismuth film electrode for complexation studies by anodic stripping voltammetry (ASV) and constant current stripping chronopotentiometry (CCSCP) are tested for Pb(II), Cd(II), and Zn(II) in the presence of phthalate. In all cases, labile complexes are detected. The regular signals obtained for the Pb(II)-phthalate system allow an accurate determination of stability constants by means of the DeFord-Hume method. As for Cd(II)-ions, the two overlapping signals usually present in the absence of ligands suffer a similar evolution with the addition of phthalate. Then, the use of an intermediate potential between both signals allows a reasonable estimation of stability constants. In contrast, the two overlapping signals obtained for Zn(II) behave in a quite irregular way in the presence of phthalate, thus hindering any quantitative analysis of the formed complexes.