熔融制样-X射线荧光光谱法测定产铀岩石中钨、钼、铌、钽、铁、磷、钒的标准方法

Standard Method for Determination of W,Mo,Nb,Ta,Fe,P,V in Uranium-Productive Rock by X-Ray Fluorescence Spectrometry

在铀矿石或者产铀岩石样品中,铌、钽、钼、钨、铁、磷、钒的含量往往较高。采用熔融制样-X射线荧光光谱法测定产铀岩石中高含量铌、钽、钼、钨、铁、磷、钒样品,通过人工配制工作标准,扩大了元素校准曲线的定量范围,采用理论α系数和经验系数法校正基体效应。采用此方法分析国家一级标准物质,各元素的测定值与标准值吻合;本方法的测量结果与ICP-MS法测量结果也基本一致。因此认为该方法可以用于产铀岩石中高含量铌、钽、钼、钨、铁、磷、钒的测定。此外该方法还可以满足硅酸盐样品、铀矿石、磷矿石等相似基体样品的测量要求。

The content of W,Mo,Nb,Ta,Fe,P,V are usually high in uranium ore or uranium-productive rock.The research focus on determing the high content samples of W,Mo,Nb,Ta,Fe,P,V by X-ray spectrofluorimetry method,through extending the calibration curve＇s quantitative range of these elements by artificial standard materials,the preparing method is fusion for Li2 B4 O7 and LiBO2-mixed flux,the correct method are theoreticalαcoefficients and the empirical coefficient.The validity of the method is substantiated by analyzing the national standard materials,the results are basically in accordance with reference contents.Additionally,the results which got by X-ray method are in accordance with the results of ICP-MS method.So this method is used to analyze high concentration of W,Mo,Nb,Ta,Fe,P,V about uranium-productive sample.This method also can analyze the silicate,uranium ore,and phosphate rock samples and other samples which are match the matrix of this method.