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

► BiSPCE appears to be a valuable alternative to mercury electrodes. ► BiSPCE is useful for the electrochemical study of metal complexation by thiol-rich peptides. ► MCR-ALS provides abundant information about Cd(II)-GSH and Cd(II)-PC2 complexation. ► The formation of complexes 1:2 and 1:1 Cd2+:GSH and 1:2 Cd2+:PC2 were proposed.