Compared with the bismuthfilm electrode (BiFE) and antimony-film electrode (SbFE), the Bi–SbFE displayed higher stripping current response. Under the optimum conditions, the sensor revealed highly linear behavior in the examined concentration
range from 1.0 to 220.0 g L−1, with the detection limit of 0.15 g L−1 for Cd(II), offering good reproducibility.