Determination of cadmium,lead,copper,antimony and bismuth in high purity arsenic and arsenous oxide by differential pulse anodic stripping voltammetry

摘要

A simple and rapid differential pulse anodic stripping method for silultaneous determination of cadmium,lead,copper,antimony and bismuth in hgih purity arsenic and arsenous oxides is described.The most suitable supporting electrolyte is found to be 2M HCl.This method is suitable for the determination of Cd,Sb,Bi (0.1 mug g~-1),Cu(0.3 mug g~-1) and Pd(0.5 mug g~-1) (with about 100mg as sample)with a relative standard deviation of 15-20%.