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X-Ray Fluorescence Analysis of Major, Minor and Selected Trace Elements in New IWG Reference Rock Samples
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Major and minor oxides: SiO2, Al2O3, TiO2, CaO, MgO, Na2O, K2O, MnO, P2O5. Fe2O3(T) and a few selected trace elements Zr, Y, Sr, Rb, V, Ba, Cr. Ni, Co, Cu, Zn in the IWG standards AN-G. BE-N and MA-N have been determined relative to USGS geochemical reference samples and synthetic standards by using a PW1400 XRF analyser with P851 computer system in an attempt to get usable values for the standards.
Samples prepared in duplicate were repeatedly (ten times) analysed to check the reproducibility of the data which is within the range of ± 1.0 % of reported values for all the major and minor elements, ± 5% for trace elements and ± 10% for the trace elements at concentrations below 10 ppm. The average values are found to be in good agreement with the proposed values. The results on MA-N granite were found to be very reproducible and MA-N may be used as a replacement of USGS-Gl or G2 which are no longer available.
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