X射线荧光光谱法测定氧化铝中PdO和La_2O_3的含量

X-ray Fluorescence Spectrometry of Determining PdO and La_2O_3 in Al_2O_3

用X荧光光谱法准确测定氧化铝中PdO和La2O3的含量，采用超声波分散人工合成标样，粉末压片法制样，经验系数法与散射线内标法校正基体效应．测量范围0．01％～1％，加标回收率91．06％～97．14％，相对标准偏差均在0．36％以下，测量一个样品所需时间仅3min，具有准确、快速、简便的特点．

The analytical method determining the content of PdO 和 La2O3 in Al2O3 with x-ray fluorescence spectrometry is developed, using artificial synthesis standard samples prepared by ultrasonic wave disperse, powder pressed method to prepare samples and empirical coefficient method combined with scatter line as internal to correct the matrix effect. The content ranges can be applied is 0. 01% - 1%, the addition recovery rate is 91.06%-97.14% and the precision （RSD） for all elements is less than 0.36%, the accuracy and precision of this method are satisfactory, analyzing one sample needs only 3 min, the analytical method is accurate, rapid and convenient.