X射线荧光光谱法测定高铁铝土矿石中的主次量元素

Simultaneous determination of major and minor components in high-iron type bauxiteby X-ray fluorescence spectrometry with fusion sample preparation

本文采用熔融制片,以铝土矿、铁矿石及自制样等标准物质拟合校准曲线,建立了X射线荧光光谱（XRF）同时测定高铁铝土矿中主次量组分（Al2O3、SiO2、Fe2O3、TiO2、CaO、MgO、K2O、Na2O、S和P2O5）的快速分析方法。解决了高铁铝土矿样品的测定问题。样品与混合熔剂在熔融稀释比例为1∶10的条件下混合均匀,在1100℃温度下熔融8min并静止10s,制备测定熔融片。采用实验方法对GBW070036、GBW07177铝土矿标准物质和1～#自控样各组分进行测定,结果的相对标准偏差（RSD,n=12）小于5%,相对误差（RE）小于10%。该方法对高铁铝土矿样品同样适用。

The certified reference materials of bauxite,iron ore and self-control standard material were prepared by fusion method for the fitting of calibration curve.The rapid analysis method for the simultaneous determination of major and minor components （Al2O3、SiO2、Fe2O3、TiO2、CaO、MgO、K2O、Na2O、S and P2O5） in silicate and bauxite by X-ray fluorescence spectrometry wasestablished to solve the problem of the determination of high iron bauxite samples.The fusion conditions of samples were obtained as follows： the sample was uniformly mixed with mixed solvent with the diletion ration of 1：10,then the sample was fusion at 1100℃ with 480S,and rest time 10S. The components in certified reference material of bauxite （GBW070036,GBW07177 and 1^#） were determined by proposed method. The relative standard deviation was less than 5%.The relative error was less than 10%.The pro- posed was also applied to the determination of high-iron type bauxite samples.