Uranium ore belongs to the national strategic minerals resource.Uranium minerals analysis is dominated by chemical analysis,which is a well established and highly standardized but with complicated procedure.X-ray fluorescence spectrometry method need large the sample dosage and can not be used for precious sample.This paper proposed a method for the determination of the Si,Al,Fe,Ca,Mg,K,Na,U in uranium ores by wavelength dispersive X-ray Fluorescence Spectrometry using ultra low-dilution for Li2B4O7 and LiBO2 mix flux(100∶1 reagent to sample).The working curve was established by a variety of uranium ore reference materials and manual preparation working standard.The inter-element effect was corrected by using the theoretical alpha coefficient with Compton scattered radiation,we also discussed the influence of the sample thickness on the sample measurement.The results are consistent with the certified values and RSD(n=10)range from 0.7%to 3.4%,the limit detection is 15 μg·g-1 for U.We used the reference materials which was not used in the regression to validated the method,the results were within the uncertainty.This study have solved the problem of the high dosage samples for the X-ray Fluorescence Spectrometry by selecting the effective flux and the ultra low dilution ratio.
uranium oreX-ray fluorescence spectrometryfusion samplingultra low dilution ratio
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