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以Li2B4O7,Li BO2和Li F(质量比为45:10:5)为混合熔剂,NH4NO3为氧化剂,Li Br为脱模剂,熔融制作样片,利用岛津1800型X射线荧光光谱分析仪,对土壤、水系沉积物、硅酸盐、白云岩等标准物质拟合校准曲线,建立了X射线荧光光谱法(XRF)同时测定岩石、土壤样品中主次量组分(Si O2,Al2O3,TFe2O3,Mg O,Ca O,K2O,Na2O,M n O,Ti O2,P2O5,Zn O)的快速分析方法。对样品制备以及分析测试过程中的条件(熔剂稀释比例、熔融温度及时间、测定电压电流以及脉冲高度分析)进行了优化,在优化的条件下,对GBW07105,GBW07401进行重复测定,相对标准偏差RSD<2%,相对误差RE<5%。同时对超基性岩、硅酸盐、沉积物、土壤等国家标准样品进行分析,结果与标准参考值有良好的一致性。
Li2B4O7, LiBO2 and LiF (mass ratio of 45: 10: 5) as a mixed flux, NH4NO3 as oxidant, Li Br as a release agent, the melt made samples, using Shimadzu 1800 X-ray fluorescence spectrometer, Soil, sediments, silicates, dolomites and other reference materials fitting calibration curve was established by X-ray fluorescence spectrometry (XRF) simultaneous determination of rock and soil samples of primary and secondary components (Si O2, Al2O3, TFe2O3, Mg O, CaO, K2O, Na2O, MnO, Ti O2, P2O5, ZnO). The conditions of sample preparation and analysis and testing (solvent dilution ratio, melting temperature and time, determination of voltage and current, and pulse height analysis) were optimized. Under the optimized conditions, the determination of GBW07105 and GBW07401 were repeated. The relative standard deviation RSD <2%, relative error RE <5%. At the same time, the national basic samples such as ultramafic rocks, silicates, sediments and soils are analyzed and the results are in good agreement with the standard reference values.