Simultaneous Determination of Ultra Trace of Uranium and Cadmium by Adsorptive Cathodic Stripping Voltammetry Using H-Point Standard Addition Method

A sensitive adsorptive cathodic stripping voltammetry with H-point standard addition method for simultaneous determination of uranium and cadmium has been developed. The trace amounts of these metal ions can be simultaneously determined using the Levodpa as complexing agent. Optimal conditions were: accumulation time 50 s, accumulation potential 0.0 mV, scan rate 40 mV s(-1), supporting electrolyte 0.1 M ammonium buffer pH 9.6, and 1 x 10(-5) M of Levodopa. The results revealed that the cadmium and uranium could be simultaneously determined by H-point standard addition method with different concentration ratios of uranium to cadmium. The method was successfully applied in a several of real samples.