X射线荧光光谱法分析镁砂的主次成分

采用镁砂标准样品作为校准样品,建立了熔融制样X射线荧光光谱法测定镁砂中MgO,Al2O3,SiO2,CaO,P2O5,Fe2O3的方法。采用熔融法为样品片和校准片的制备方法,选择四硼酸锂-偏硼酸锂（67＋33）为助熔剂,1.00mL LiBr溶液为脱模剂,熔融温度为1 100℃,熔融时间20min。对镁砂样品测定的相对标准偏差（RSD）小于3%,对不同镁砂标准样品进行测定,方法的测定结果与认证值相吻合。

Determination of Major and Minor Components in Magnesia by X-ray Fluorescence Spectrometry Wu Zengsheng , Liu Zhimin

With certified reference materials of magnesia as calibration samples,a new method was established for the determination of major and minor components including MgO,Al2O3,SiO2,CaO,P2O5 and Fe2O3in magnesia by X-ray fluorescence spectrometry.The preparation of testing sample and calibration sample were carried out by fusion method.The optimized experimental conditions were obtained as follows：a mixed solution of Li2B4O7-LiBO2（67＋33）was used as fusing agent,1mL LiBr was used as remover,the fusion temperature was 1 100 ℃,and the fusion time was 20 min.The relative standard deviation（RSD）was less than 3%.The determination results were consistent with the certified values.