Can bismuth film screen printed carbon electrodes be used to study complexation?

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). ucibility 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.