Determination of uranium by adsorptive stripping voltammetry at a lead film electrode.

An adsorptive stripping voltammetric procedure for the determination of U(VI) at an in situ plated lead film electrode is described. The U(VI) complex with cupferron was accumulated from an acetate buffer solution of pH 4.2 at the potential -0.65V. The measurements were carried out from undeaerated solutions. The calibration graph for an accumulation time of 180s was linear from 5x10(-10) to 2x10(-8)molL(-1). The detection limit was 2x10(-10)molL(-1), the relative standard deviation for 2x10(-8)molL(-1) U(VI) was 4.3%. The proposed procedure was validated in the course of U(VI) determination in water certified reference materials.