Abstract:
A new procedure was elaborated to determine trace bismuth(III) using an anodic stripping square-wave voltammetry at the antimony film carbon paste electrode (SbF-CPE). The method is realized in highly acidic medium of hydrochloric acid in which antimony peak is negligible, and apparently catalyzed by presence of cadmium(II), thus allowing the determination at ppb levels. Calibration dependence was linear up to 110 ppb Bi with a detection limit (3 sigma) of 1.55 ppb. Applicability of the method was tested on the real sample of river water.
