水泥产品中三氧化硫(SO3)的含量对其性能影响明显,因此对其含量测定尤为重要.本研究采用手持式能量色散X-射线荧光光谱技术快速测定水泥产品中SO3的含量,优化了SO3的测试条件,构建了SO3含量测定的校准工作曲线.结果表明:8种不同种类的普通硅酸盐水泥校准样品中SO3含量在0.31%~3.16%范围内呈线性关系,相关系数大于0.99.运用该校准工作曲线进行普通硅酸盐水泥和复合硅酸盐水泥产品中SO3含量的测定,手持式能量色散X-射线荧光光谱法的测定结果与实验室标准法相当.
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.
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