DETERMINATION OF VANADIUM IN DIETARY SUPPLEMENTS
Urška Repinc and Ljudmila Benedik
Environmental Sciences, Jožef Stefan Institute, 1000
In our present work 10 sports dietary supplements and 6 daily multivitamin/mineral supplements were analysed for vanadium content. Radiochemical neutron activation analysis was used to determine whether vanadium had been added to some popular dietary supplements used to increase muscle mass. After irradiation and rapid dissolution of the irradiated sample, solvent extraction was used for selective separation of vanadium. The chemical yield of the radiochemical procedure for each sample aliquot was determined by spectrophotometry. The daily intakes of supplemental vanadium were compared to the median intake of supplemental vanadium and Tolerable Upper Intake Level (UL).
Key words: vanadium, supplements, neutron activation analysis