Wavelength-Dispersive X-ray Fluorescence Spectrometric Determination of seven major-element oxides in silicate-rocks without the use of fused sample glass discs Viswanathan S.1, Rao K. Surya Prakash2,* 1Flat B-203, Block-B, United Avenue Apartments, South End, 7-1-29, Ameerpet, Hyderabad-500016 21-2-98, Kakatiyanagar, Habsiguda, Hyderabad-500007 *ksprao1939@yahoo.co.in
Abstract The conventional method for determining SiO2, TiO2, Al2O3 total iron as Fe2O3, MnO, MgO, CaO, Na2O, K2O, and P2O5 in silicate-rocks by wavelength-dispersive x-ray fluorescence spectrometry (WDXRFS) uses fused sample glass discs, the preparation of which is tedious, cumbersome, and time-consuming. The paper proposes a simple, accurate, precise, and rapid WDXRF spectrometnc technique for determining SiO2, TiO2, Al2O3 Fe2O3 MnO, CaO, and K2O in silicate-rocks using plain, pressed powder-pellets prepared from minus 300 mesh powders. The accuracy and precision of the technique for SiO2, TiO2, Al2O3, Fe2O3 CaO, and K2O are excellent (within 1%). The accuracy for MnO is within 4.5% and the precision is within 4%. The time taken for determining these seven major-element oxides in a batch of twentyfour samples of silicate-rocks, for a replication of four analyses, per sample, by one operator, using a manual WDXRF spectrometer is only ten hours. Top Keywords Wavelength-dispersive X-ray fluorescence spectrometry (WDXRFS), Silicate-rocks, Major-element oxides. Top |