Author(s): Khalid A. Al-Rashood and M.E. Mohamed
Article publication date: 1988-12-01
Vol. 6 No. 3 (yearly), pp. 377-385.
182
Keywords
tap water, metal ions, anodic stripping voltammetry
Abstract
Lead, cadmium, copper and zinc in part-per-billion (ppb) levels in laboratory tap water were determined by differential pulse anodic stripping voltammetry (DPASV). Triammonium citrate (0.2 M) was used as a supporting electrolyte. Differential pulse anodic stripping voltammograms for samples prior to and after spiking were recorded in the potential range - 1.2 to 0.0 volts by a microprocessor-controlled polarographic analyser. The indicator electrode used was static mercury drop electrode (SMDE) combined with Ag/AgCl (KCl sat.) reference electrode and a platinum auxiliary electrode. The results obtained by adopting standard additions method showed relative standard deviations less than 10%.