关键词: 能量色散X-射线荧光光谱法(EDXRF);校准工作曲线;水泥产品;三氧化硫

Abstract: The performance of cement is closely related to the content of SO3 in the cement products.So, the determination of SO3 is particularly important.The handheld energy dispersive X-ray fluorescence spectroscopy(EDXRF) was applied to determination of SO3 in the cement samples, the test conditions of SO3 were optimized, and the calibration curve was built.The result shows that linear relationships within values of fluorescence intensity and mass fraction of SO3 were found in the same range within 0.31%-3.16% in the standard samples of eight different kinds of Portland cement, and the correlation coefficient was greater than 0.99.The proposed calibration curve was used in testing the content of SO3 in the ordinary and composite Portland cement samples, giving test results of EDXRF inconsistency with that of the standard method.

Key words: energy dispersive X-ray fluorescence spectrum;calibration working curve;cement product;SO3