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Full Paper
Stripping Chronopotentiometry and Stripping Voltammetry of Mixtures of Heavy Metal Ions Producing Close Signals: The Cd(II)-Pb(II)-Phthalate System
Article first published online: 19 APR 2006
DOI: 10.1002/elan.200603492
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
1521-4109/asset/cover.gif?v=1&s=209b447dcf920ba3fb44f2b08a87a6b586320422 "Electroanalysis")
Additional Information
How to Cite
Serrano, N., Díaz-Cruz, J., Ariño, C. and Esteban, M. (2006), Stripping Chronopotentiometry and Stripping Voltammetry of Mixtures of Heavy Metal Ions Producing Close Signals: The Cd(II)-Pb(II)-Phthalate System. Electroanalysis, 18: 955–964. doi: 10.1002/elan.200603492
Publication History
- Issue published online: 9 MAY 2006
- Article first published online: 19 APR 2006
- Manuscript Accepted: 8 MAR 2006
- Manuscript Received: 9 JAN 2006
- Abstract
- References
- Cited By
Keywords:
- Stripping chronopotentiometry (SCP);
- Anodic stripping voltammetry (ASV);
- Mercury film electrode (MFE);
- Hanging mercury drop electrode (HMDE);
- Multianalyte system;
- Heavy metal speciation
Abstract
The effects of the proximity of the signals of two heavy metal ions in stripping voltammetry (SV) and constant-current stripping chronopotentiometry (SCP) is studied at mercury drop (HMDE) and mercury film (MFE) electrodes. For this purpose, the Cd(II)-Pb(II)-phthalate system is used, taking advantage of the approaching of the signals corresponding to Cd(II)-phthalate and Pb(II)-phthalate labile complexes as phthalate is added to mixtures of Cd(II) and Pb(II)-ions. The results are compared with those obtained by differential pulse polarography (DPP) and by stripping measurements on the Pb(II)-phthalate system alone, showing discrepancies in SCP data under nondepletive conditions and negligible differences in the other cases.