Simultaneous determination of trace uranium and vanadium in biological samples by radiochemical neutron activation analysis

Repinc, U.; Benedik, L.
April 2005
Journal of Radioanalytical & Nuclear Chemistry;Apr2005, Vol. 264 Issue 1, p77
Academic Journal
A radiochemical neutron activation analysis (RNAA) for simultaneous determination of uranium and vanadium in a single sample at trace levels is described. The method is based on post-irradiation wet-ashing and solvent extraction of vanadium with N-benzoyl-N-phenyl-hydroxylamine reagent. From the remaining aqueous phase, uranium is extracted into a toluene solution of tri-n-butyl phosphate. The chemical yields are determined spectrophotometrically for vanadium and by gamma-counting of the added natural uranium carrier for uranium. The method was evaluated by the analysis of reference materials and the results showed a good agreement with the certified values. The method was applied to the determination of vanadium and uranium in five military total diet samples in Slovenia.


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