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利用Axios X射线荧光光谱仪,借助粉末压片制样测定了富砷地质样品中As,S,Ti,V,Cr,Mn,Zr,Co,Ni,Cu,Zn,Mo,Ba,Pb,SiO2,Al2O3,Fe2O3,MgO,CaO,Na2O和K2O等21种主次痕量元素,用理论α系数校正基体效应,用强度方式计算重叠系数校正重叠干扰。实验结果表明,该方法除Mo的检出限0.8μg/g超出地球化学普查要求检出限0.5μg/g外,其它元素满足要求;除元素Mo的均值方根高于2倍相对计数统计误差外,其它元素的均值方根均小于2倍相对计数统计误差,且绝大多数元素的均值方根(n=12)都小于1.0%;另外,对国家标准物质的测试结果与标准值相一致。将本方法用于实际样品的测试,分析结果与其它化学分析方法相符。
The content of As, S, Ti, V, Cr, Mn, Zr, Co, Ni, Cu, Zn, Mo, Ba, Pb, SiO2 and Zn in the arsenic-rich geological samples were determined by Axios X-ray fluorescence spectrometer. Al2O3, Fe2O3, MgO, CaO, Na2O and K2O. The theoretical α coefficient was used to correct the matrix effect and the overlap coefficient was calculated by the intensity method to correct the overlap interference. The experimental results show that except the detection limit of 0.8μg / g for Mo, which exceeds the detection limit of 0.5μg / g for geochemical survey, the other elements meet the requirements. The mean square root of elemental Mo is higher than twice the statistical error of relative counting , The root mean square of other elements were less than 2 times the relative statistical error of counting, and the mean square roots (n = 12) of most elements were less than 1.0%. In addition, the test results of national reference materials were consistent with the standard values . The method is used for the actual sample test, the analysis results are consistent with other chemical analysis methods.