%0 Journal Article
%T A new method for determining the concentration of vanadyl ions in clays
%A Pavle I. Premovi
%A Budimir S. Ili
%A Dragan M.  or evi
%J Geologica Carpathica
%@ 1336-8052
%D 2011
%I 
%R 10.2478/v10096-011-0015-x
%X A novel and simple method for quantitatively determining the concentration of vanadyl ions in clays using electron spin resonance data has been developed. Several vanadyl standards with concentrations between 200-1000 ppm were prepared in a mixture of glycerol and kaolinite (KGa-2). The anisotropic electron spin resonance (ESR) spectra were recorded at room temperature, and the specific intensity of the line (attributed to nuclear spin m = -5/2||) was determined. For vanadyl concentrations between 50 ppm and 200 ppm, the standards must be prepared by mixing kaolinite with known vanadyl content (FBT2A-03) and kaolinite (GB1) containing no vanadyl. The method is applicable without modification to other clays and clay-rich sediments containing vanadyl ions. The whole procedure is very suitable for routine work.
%K clay
%K kaolinite
%K vanadyl
%K determination
%K electron spin resonance
%U http://versita.metapress.com/content/k746048818n11190/?p=934c580f4dc24b6083b17f813b2c4d40&pi=5