Direct determination of molybdenum in polyvitaminic tablets by voltammetry in non-aqueous media

摘要

Adsorptive stripping voltammetry carried out in a homogeneous ternary solvent composed of N,N-dimethylformamide, water and ethanol, with a-benzoinoxime (aBO) as the complexing agent for Mo(VI) and a 0.5 mol L-1 acetic acid – sodium acetate buffer as supporting electrolyte was successfully used for the determination of molybdenum in polyvitamin-polymineral tablets. Tablet samples were analyzed and the results were compared with those obtained both by graphite furnace atomic absorption and by recovery tests, with good correlations, indicating that this may be considered as an alternative procedure for routine determination of Mo(VI) in pharmaceutical samples.