玻璃熔片制样X射线荧光光谱法测定矾土中主次量组分

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。

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

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 SiO_2, Fe_2O_3, Al_2O_3, CaO, MgO, K_2O, P_2O_5 and TiO_2 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%.