熔融制样-X射线荧光光谱法测定重晶石中主次量元素

Determination of Major and Minor Elements in Baryte Ores by X-ray Fluorescence Spectrometry with Fusion Sample Preparation

摘要: 准确测定重晶石中硫酸钡及锶等组分的含量,对于评价矿石的质量品级十分重要。文章应用X射线荧光光谱法测定重晶石中BaO、Al₂O₃、Fe、CaO、MgO、SiO₂、Na₂O、K₂O、Sr等9种主、次量组分。采用熔融片制样,消除了矿物结构效应,降低基体效应的影响,研究了熔样的条件,确定仪器测量的最佳参数。各元素相对标准偏差(RSD,n＝10)≤10%,测定结果与化学法测定值相符,同时满足了ISO 9507对各元素分析结果准确度≤0.5%的要求。方法快速、准确,方便快捷,具有良好的精密度和准确度,可用于重晶石矿选矿样品尾矿、中矿、精矿中钡、锶、铁、钙、镁、铝、硅、钾、钠的同时测定,也可代替传统的化学法用于选冶实验分析。

Abstract: In order to avoid the influences of mineral structures and reduce matrix effects, a fusion method has been developed as the sample preparation step for the analysis of 9 major and minor elements components in baryte ores with X-ray fluorescence spectrometry. The fusing conditions were thoroughly studied for the optimization of instrument parameters, and then corresponding working curves were established. The relative standard deviations (RSD) for each element analyzed was less than 10%, and analysis accuracy was in good agreement with ISO 9507. Experimental results indicated that this method was accurate, and well suited for the analysis of baryte ores.