Anodic stripping voltammetric determination of lead, cadmium and thallium in natural brines

The method of lead, cadmium, and thallium determination by anodic stripping voltammetry in natural sodium chloride brines is developed. The method involves the preliminary extraction of Pb and Cd from brine by their co-crystallization with sodium chloride formed during evaporation, and its subsequent analysis. The determination of Tl is carried out in mother solution after ultraviolet irradiation. The relative standard deviation (n=5) is equal to 0.05(Pb, Cd) and 0.10 (Tl) when the element concentrations are determined at levels of 0.1-5 mg/l (Pbm Cd) and 0.02-0.2 mg/l (Tl)