Abstract

A rapid x-ray fluorescence method has been developed for analysis of chrome ores, chrome-magnesia, and magnesia-chrome materials by fusion of the powdered samples with sodium hexametaphosphate and lanthanum oxide. Three NBS standards, one British standard and a few in-house wet chemically analyzed samples were run for SiO₂, Fe₂O₃, Al₂O₃, CaO, MgO, and Cr₂O₃ for standardizing the method. Linear regression equations were applied for determining the best fit line. Relative standard deviations were 3% or less except for CaO (5.4%) because of its usually very low concentration.

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