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Titolo:
Voltammetry of heterogeneous labile metal-macromolecular systems for any ligand-to-metal ratio - Part II. Obtaining the binding curve from the normalised limiting currents
Autore:
Puy, J; Torrent, M; Galceran, J; Cecilia, J; Salvador, J; Monne, J; Companys, E; Garces, JL; Mas, F;
Indirizzi:
Univ Lleida, Dept Quim, E-25198 Lleida, Catalonia, Spain Univ Lleida Lleida Catalonia Spain E-25198 25198 Lleida, Catalonia, Spain Univ Lleida, Dept Matemat, E-25198 Lleida, Catalonia, Spain Univ Lleida Lleida Catalonia Spain E-25198 25198 Lleida, Catalonia, Spain Univ Barcelona, Dept Quim Fis, E-08028 Barcelona, Catalonia, Spain Univ Barcelona Barcelona Catalonia Spain E-08028 celona, Catalonia, Spain
Titolo Testata:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
fascicolo: 1-2, volume: 514, anno: 2001,
pagine: 83 - 93
Fonte:
ISI
Lingua:
ENG
Soggetto:
AFFINITY DISTRIBUTIONS; DISSOCIATION KINETICS; THEORETICAL-ANALYSIS; COMPLEX SYSTEMS; ION-BINDING; SPECIATION; COEFFICIENTS; PARAMETERS; ADSORPTION; MIXTURES;
Keywords:
voltammetry; macromolecular complexation; speciation; heterogeneity; affinity spectrum;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Puy, J Univ Lleida, Dept Quim, Av Rovira Roure 177, E-25198 Lleida, Catalonia, Spain Univ Lleida Av Rovira Roure 177 Lleida Catalonia Spain E-25198 pain
Citazione:
J. Puy et al., "Voltammetry of heterogeneous labile metal-macromolecular systems for any ligand-to-metal ratio - Part II. Obtaining the binding curve from the normalised limiting currents", J ELEC CHEM, 514(1-2), 2001, pp. 83-93

Abstract

This paper discusses the determination of the binding curve from limiting currents. Recently, an analytical approximation for the limiting current interms of the bulk complex concentration has been proposed. This expressionis so simple that it can be easily inverted allowing the computation of the binding curve from normalised limiting currents corresponding to the titration of a fixed amount of ligand with metal. Different complexation modelswith discrete or continuous affinity spectra are analysed. An affinity window associated with a given titration is recognised and it is shown that anaccurate binding curve can be obtained by combining the meaningful affinity windows of several titration experiments with different amounts of ligand. The global aim of the paper is to enhance the possibilities of binding studies from voltammetric limiting currents providing some criteria to succeed in this analysis. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 04/04/20 alle ore 03:03:27