玻璃熔片制样X射线荧光光谱法测定矾土中主次量组分

Determination of Major and Minor Components in Bauxite by X-ray Fluorescence Spectrometry with Fusion Sample Preparation

摘要: 建立了玻璃熔片-X射线荧光光谱测定进出口矾土中主、次量组分的分析方法，用可变α系数校正元素基体效应，同时进行谱线重叠校正。利用高纯化学试剂配制合成标准参考物质，球磨机混匀，熔融玻璃片法制备系列校准样片，用X射线荧光光谱法对样品中的二氧化硅、三氧化二铁、三氧化二铝、氧化钙、氧化镁、氧化钾、五氧化二磷、二氧化钛进行测定。方法回收率为98.1%～111.0%，经国家铝矾土标准物质GBW 07178、GBW 07179验证，结果与标准值基本一致。建立的方法解决了测试过程中标准样品种类和数量不足的难题。

Abstract: A method for the determination of major and minor components in imported and exported bauxites by X-ray fluorescence spectrometry with fusion sample preparation technique was developed. The matrix effect was eliminated using variable α coefficient method and spectral line overlap was also corrected. The calibration samples were artificially synthesized with high purity compounds. The method has been applied to the determination of SiO2, Fe2O3, Al2O3, CaO, MgO, K2O, P2O5 and TiO2 in national standard reference bauxite samples (GBW 07178 and GBW 07179). The results are in good agreement with certified values with recovery of 98.1%～111.0%.