X-ray fluorescence spectrometry using the JRRM800 reference materials series and its application to the determination of spinel raw material components

In order to analyze spinel raw materials by X-ray fluorescence spectrometry we applied JRRM800 series reference materials prepared by the Technical As sociation of Refractories, Japan. The standard deviation (SD) of the calibr ation curves, obtained by using JRRM800 series glass beads, are very satisf actory: less than 0.1 mass% for the main components and less than 0.02 mass % for impurities. The obtained reproducibilities (within-laboratory) amply satisfied the permissible tolerance of each component in JIS R 2014 (method for chemical analysis of Al2O3 - MgO). This analysis method could be appli ed to the determination of Al2O3 from 95 to 50 mass% in commercial spinel r aw materials. From the analytical results, it was shown that these spinels were made from synthetic and/or natural raw materials of both alumina and m agnesia sources.