Anodic stripping voltammetric determination of uranium at a thin palladium film-aluminum electrode: Analysis of some uranium mineral ores

摘要

In the present work, a rapid deposition anodic stripping voltammetry (ASV) for determination of uranium is presented. For this purpose, the uranyl hexacyanoferrate (K2UO2[Fe(CN)(6)]) is deposited electrochemically on a thin palladium-aluminum electrode (Pd-Al) from a UO22+ solution in the presence of K3Fe(CN)(6). Then, the well stable (K2UO2[Fe(CN)(6)]) on the electrode was stripped by anodic differential pulse voltammetry for measuring the UO22+ ion concentration. The effect of operational parameters, including: concentration of K3Fe(CN)(6), solution pH, deposition potential, and deposition time were studied. In optimum conditions, the calibration graph was linear in the concentration range 10(-5)-7 x 10(-4) mol L-1 with a detection limit of 6.2 x 10(-6) mol The influence of some concomitant ions in K2UO2[Fe(CN)(6)] formation was investigated. The proposed method was used for the rapid determination of uranium in sonic uranium mineral ores.