Can bismuth film screen printed carbon electrodes be used to study complexation?
2013
Sosa, Velia | Serrano, Núria | Ariño, Cristina | Manuel Díaz-Cruz, José | Esteban, Miquel
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 Cd²⁺ 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 Cd²⁺:GSH and 1:2 Cd²⁺: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.
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