催化剂原料高岭土的XRF分析

X RAY FLUORESCENCE ANALYSIS OF KAOLIN CONCENTRATE

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。

An X ray fluorescence technique was developed for the analysis of Al 2O 3,SiO 2 and impurities in Kaolin concentrate.Two standard series,one for dual series of Al 2O 3 SiO 2 and the other for all of the impurities,were prepared,respectively,from spectral pure agents based on the estimates of analyte content ranges and matrix effects in Kaolin concentrate.Powderd sample after determination of loss of ignition was pressed into disc by means of a little powderd sample preparation method modyfied in this paper.All analyte contents were calculated directly from the calibration curves without any matrix correction.In contrast to fusion technique the method has no the effects of flux impurities and dilute ration on the determination of minor and micro components in Kaolin concentrate.Errors of the results are <1% for major component Al 2O 3,SiO 2 and total,and <5% for most and <10% for few of the impurities.