A Study of the square-wave modulation for the determination of trace metals by anodic and adsorptive stripping voltammetry on bismuth-film electrodes

Abstract

This work reports on the application of square-wave stripping voltammetry for the simultaneous determination of trace metals on bismuth-film electrodes (BiFEs). Cd)II), PB(II) and Zn(II) were determined by square-wave anodic stripping voltammetry (SWASV) on an in-situ plated BiFEs while Ni(II) and Co(II) were determined by square-wave adsorptive stripping voltammetry (SWAdSV) on an exsitu plated BiFE. The general characteristics and advantages of the square-wave modulation are presented and discussed in the context of representative voltammograms. The effects of the square-wave parameters (frequency, step increment, pilse height) on the voltammetric signals obtained on BiFEs were studied and discussed in both the cases of SWASV and SWAdSV.