0181356 - UFCH-W 20020011 RIV CH eng J - Journal Article
Cruz, B. H. - Diaz-Cruz, J. M. - Šestáková, Ivana - Velek, Jiří - Arino, Ch. - Esteban, M.
Differential Pulse Voltammetric Study of the Complexation of Cd(II) by the Phytochelatin (.gamma. -Glu-Cys)2Gly Assisted by Multivariate Curve Resolution.
Journal of the Electroanalytical Chemistry and Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. Roč. 520, 1/2 (2002), s. 111-118. ISSN 0022-0728
R&D Projects: GA ČR GV204/97/K084
Institutional research plan: CEZ:AV0Z4040901
Keywords : heavy metal speciation * cadmium * voltammetry
Subject RIV: CG - Electrochemistry
Impact factor: 2.027, year: 2002

A multivariate curve resolution method by alternating least squares is applied to differential pulse voltammograms measured on the Cd(II)+(.gamma.-Glu-Cys)2 Gly system as a model of metal-phytochelatin interactions. The combined analysis of both matrices from titrations of peptide with metal and of metal with peptide (concentration range 10-7 to 10-5 mol1-1) allowed the resolution of the system. The analysis of the resulting pure voltammograms and concentration profiles of the resolved components suggested the presence of four different types of bound Cd(II) and made possible the formulation of a complexation model.
Permanent Link: http://hdl.handle.net/11104/0077938