title: Can bismuth film screen printed carbon electrodes be used to study complexation?
abstract: Ex- situ bismuth film on commercial screen-printed carbon electrodes (BiSPCE) has been used for the first time for the analysis of the complexation of Cd(2+) by thiol containing compounds as glutathione (GSH) and phytochelatin (γ-Glu-Cys)2-Gly (PC2). Reproducibility of data is quite satisfactory and allows their treatment by multivariate curve resolution by alternating least squares (MCR-ALS). Unitary voltammograms and concentration profiles provided by MCR-ALS confirm the formation of 1:1 and 1:2 Cd(2+):GSH and 1:2 Cd(2+):PC2 complexes. These results are in agreement with those previously obtained by mercury electrodes, and allow us to propose the use of BiSPCE for further studies on complexation.
authors.affiliation: Departament de Química Analítica, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1-11, Catalunya, E-08028 Barcelona, Spain.
authors.forename: Velia
authors.initials: V
authors.lastname: Sosa
authors.forename: Núria
authors.initials: N
authors.lastname: Serrano
authors.forename: Cristina
authors.initials: C
authors.lastname: Ariño
authors.forename: José
authors.initials: J
authors.lastname: Manuel Díaz-Cruz
authors.forename: Miquel
authors.initials: M
authors.lastname: Esteban
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D056831:Coordination Complexes / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D005978:Glutathione / Q000737:chemistry*; D054811:Phytochelatins / Q000737:chemistry*
chemical_list: D002614:Chelating Agents; D056831:Coordination Complexes; D002104:Cadmium; D002244:Carbon; D054811:Phytochelatins; D005978:Glutathione; D001729:Bismuth