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本文拟定了Ｘ－射线荧光分析催化剂原料高岭土中Ａｌ２Ｏ３、ＳｉＯ２和杂质成分的方法。根据精矿中分析元素含量范围和基体效应的估计，分别合成了Ａｌ２Ｏ３－ＳｉＯ２二元系和含所有杂质成分的两套标准系列，测定烧失量后的粉末样品。用本文改进的少量粉末样品制备法压片，各组分含量由校正曲线直接求取而不需基体校正。与熔片法相比，本法不存在熔剂杂质和稀释比对高岭土精矿中微量成分测定的影响。
In this paper, a method of X-ray fluorescence analysis of Al2O3, SiO2 and impurities in kaolin as raw material for catalyst was developed. According to the analysis of elemental content range and matrix effect in the concentrate, Al2O3-SiO2 binary system and two sets of standard series containing all the impurity components were synthesized respectively, and the powder samples after the loss on ignition were measured. A small amount of powder sample prepared by this method is pressed into tablets, and the content of each component is determined directly from the calibration curve without the need of matrix correction. Compared with the melting method, this method does not exist flux impurities and dilution ratio of kaolin concentrate trace elements in the determination of the impact.