X射线荧光光谱法测定铁矿石中主次成分

Determination of Main and Minor Components in Iron Ores by X-ray Spectormetry

采用四硼酸锂和偏硼酸锂,氟化锂[m(Li2B4O7)∶m(LiBO2)∶m(LiF)=4.5∶1∶0.4]为熔剂,采用1∶30熔剂稀释比,于1 050℃熔融铁矿样品制成玻璃样片,用波长色散X射线荧光光谱仪同时对样片中Fe、Si、Al、Mg、Ca、Na、K、P进行测定。用铁矿石标样经同法测定并对测定结果进行理论a系数校正后绘制工作曲线。10次制样测量各组分,相对标准偏差在0.43%～5.86%范围内,该方法与化学测定结果符合较好,完全满足日常分析的需要。

The samples were made into a glass melting piece at 1 050 ℃ with [m（Li2B4O7）∶m（LiBO2）∶m（LiF）=4.5∶1∶0.4] as flux at a dilution of 1∶30.The elements includingFe、Si、Al、Mg、Ca、Na、K、P in the melting piece were simultaneously determined by X-ray spectrometry.The calibration curve was carried out with the standard samples.Whose determination results obtained by X-ray fluorescence were calibrated with a theoretical a-coefficient.Results obtained by the method were in good accordance with those values determined by chemical methods.Relative standard deviation（n=10）for each component were in the range of 0.43%～5.86%.