[Determination of RE2O3-Mo-Co in hydrogenation catalyst by X-ray fluorescence spectrometry]

An X-ray fluorescence spectrometer was applied to the determination of Mo-Co-RE2O3 in hydrogenation catalyst. The standard samples were manually synthesized, the powder pellets were used for sample preparation, and the matrix effects were corrected by the empirical coefficients. A series of sampling methods and spectrum conditions were studied. The ranges of the determination are MoO3: 7%-13%, CoO: 2%-7%, and RE2O3: 3%-6%. The results show that the accuracy and precision of this method are satisfactory. The relative standard deviations for MoO3, CoO and RE2O3 are less than 2% for the above analytical ranges. The method has been used in routine analyses. The results agree well with other methods.