DETERMINATION OF VANADIUM IN DIETARY SUPPLEMENTS
Urška Repinc and Ljudmila Benedik
Department of
Environmental Sciences, Jožef Stefan Institute, 1000
e-mail: urska.repinc@ijs.si
Abstract
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