X射线荧光光谱法同时测定煤灰中的12种成分

采用熔融制样法，用X射线荧光光谱法同时测定煤灰中的常量、少量和微量成分SiO₂，Al₂O₃，Fe₂O₃，CaO，SO₃，TiO₂，K₂O，Na₂O，P₂O₅，Mg_O，MnO，BaO。选用混合熔剂并加入氧化剂的方式降低熔融温度，解决了硫的准确测量问题。同时通过选用土壤等标准样品解决了煤灰成分标准样品不足的问题。应用可变理论α系数及固定α系数法进行基体效应校正，所得结果与化学法的分析结果相符合。

Determination of 12 Elements In Coal Ash by X-Ray Fluorescence Spectrometry

A method for the determination of SiO2, Al2O3, Fe2O3, CaO, SO3, TiO2, K2O, Na2O, P2O5, MgO, MnO and BaO in coal ash by X-ray fluorescence spectrometry with melt sample preparation was developed. This method solved the problems of determination accuracy of S by using the 12:22 mix flux and oxide to lower the melt temperature. Using the soil standard sample and mixing the soil standard sample and coal ash standard sample solved the problem that there are not enough standard samples for coal ash analysis by XRF. The accuracy and precision of this method are acceptable, and the results are comparable to the those obtained by wet chemical method.