甲苯歧化催化剂中含有α-AI_2O_3、稀土分子筛(R_)及无定形硅铝(Si-Al)等组分,用化学法测定其中α-Al_2O_3含量有一定的困难。近年来x-射线衍射法用于定量分析的研究工作有很多报导。上述情况下,x-射线衍射定量分析确是一种比较适合的方法。但由于通常需要采用内标制作成校正曲线,然后才能对未知样品定量,因此手续烦杂。我们试用了基体抵偿x-射线衍射定量分析法对甲苯歧化剂中的α-Al_2O_3进行了定量测定。基体抵偿法系在原样中加入一种抵偿 Toluene disproportionation catalyst contains α-AI_2O_3, rare earth molecular sieve (R_) and amorphous silicon aluminum (Si-Al) and other components, the determination of which α-Al_2O_3 content by chemical methods have some difficulties. In recent years, x-ray diffraction method used for quantitative analysis of the work of a lot of reports. In the above circumstances, x-ray diffraction quantitative analysis is indeed a more appropriate method. However, due to the usual need to use internal standard calibration curve, and then to the unknown sample quantification, so complex procedures. We tried the matrix compensation x-ray diffraction quantitative analysis of toluene-disproportionator in the α-Al_2O_3 quantitative determination. Matrix compensation law in the original sample by adding a compensation