Abstract：A determination method of seven components in magnetite was investigated by X-ray fluorescence spectrometry with fusion sample preparation.Such influence factors, including dilution ratio, the oxidant dosage (lithium nitrate) and the releasing agent (lithium bromide) dosage, were discussed. Under the optimal conditions, melting temperature and melting time was further selected. After glass sample pieces were prepared by fusion at 1 050 ℃ for 10 min with dilution ratio of 1∶20, seven components in magnetite, including TFe, CaO, MgO, Al2O3, SiO2, TiO2, were directly determined by X-ray fluorescent spectrometry. Calibration curves were established by magnetite certified reference materials with different iron content, and the linear correlation coefficients were not less than 0.997 4. When this method was applied to the determination of actual magnetite sample, the results were consistent with those obtained by chemical method, and the relative standard deviation (RSD) were as follows: 0.29% for TFe, 3.4% for S and 0.29%-2.5% for other elements.
