Metal complexation by electroanalytical techniques : hard -and soft- modelling approaches Authors Cristina Ariño Blasco José Manuel Díaz Cruz Miquel Esteban Abstract Two general approaches are used to investigate metal complexation by electrochemical tools. The first one, hard-modelling, is based on the postulation of a theoretical physicochemical model for both the electrode reaction and complexation processes, and its further analytical or numerical resolution. Later, the fitting of the parameters of that model to the experimental data provides the information about metal complexation. The second approach, soft-modelling, involves the identification of a complexation model from the numerical and statistical analysis of data, without any previous assumption of a model. This approach has been extensively applied to spectroscopic data, but very rarely used with electrochemical results. In this article we deal with the formulation of a model (hard-modelling) for metal complexation in mixed-ligand systems, including macromolecular ligands, and with the application of the soft-modelling technique designated Multivariate Curve Resolution by Alternating Least Squares to several systems of biological and environmental interest. Downloads Text complet (Català) PDF Published 2004-10-26 Issue 2-3 Section Research reviews License This work is subject, unless the contrary is indicated in the text, the photographs or in other illustrations, to an Attribution —Non-Commercial— No Derivative Works 3.0 Creative Commons License, the full text of which can be consulted at http://creativecommons.org/licenses/by-nc-nd/3.0/. You are free to share, copy, distribute and transmit the work provided that the author is credited and reuse of the material is restricted to non-commercial purposes only and that no derivative works are created from the original material.