Abstract：A fusion sample preparation technique has been developed with mixed flux (Li2B4O7-LiBO2-LiBr) by using a 1∶8 dilution ratio at 950 ℃ and fusion for 20 minutes. The contents of twelve components in limestone and dolomite including CaO, MgO, SiO2, Al2O3, Fe2O3, MnO, P, S, TiO2, SrO, K2O and Na2O were determined by X-ray fluorescence spectrometry(XRF). Calibration curves were carried out and fitted for the concentration subsection with limestone and dolomite certified reference materials, spectrum pure reagents, synthetic samples prepared with certified reference materials and standard solution, and chemical certified materials. The matrix effect in limestone and dolomite was corrected by applying Compton scatter for element Mn, Fe, Sr and using empirical coefficient methed for the other nine elements. The precision experiment was performed with limestone and dolomite sample. The relative standard deviation (RSD, n=10) was 0.18%-11.4%. The accuracy test was conducted with certified reference material and unknown sample. The results were consistent with the certified values and those obtained by wet method.
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