依据基本参数法(FP法)无标样分析原理建立了数理模型,计算得到了模型中质量吸收系数(μ)、激发因子(E)等关键参数,并将其应用于能量色散X荧光(EDXRF)分析.实验中,对V-Ti-Fe伪三元系样品利用基于硅漂移探测器(SDD)的EDXRF测量系统(SDD-EDXRF)进行能谱测量,采用自行开发的FP法无标样分析程序,分析得到了三元系混合样品中各元素的含量.结果表明该无标样数理模型能较好地克服V-Ti-Fe元素间的吸收增强效应,方法的精密度相对标准偏差低于0.9％,测量值与实际值的最低相对误差小于1％.%It created a mathematical analysis model according to non - standard samples theory of FP method and gained the key s of the model such as mass - absorption coefficients and factors. Meanwhile, we applied it into EDXRF analysis process. In experiment, a series of Fe - V - Ti pseudo - ternary system samples were analyzed with an energy dispersive X - ray analyzer based on a SDD and each elements content of the samples were calculated via the FP calculation procedure. The result shows the mathematical analysis model can overcome the absorption - enhancement effect among Ti、V、Fe elements well and the lowest relative error between and actual value is 1 % and the deviation of the accuracy is no more than 0.9%.
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