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本文研究了用 ICP- MS仪器同时测定稀土金属中 Mg、Al、Ti、Cr、Mo、Mn、Co、Ni、Cu、Zn、Pb、W、Nb、Ta等 14种非稀土杂质。研究了各稀土基体对被分析元素的基体效应 ,选择了相匹配的内标元素。比较了标准曲线法与标准加入法的测定结果。确定了用内标元素校正基体效应及仪器漂移 ,以标准曲线法直接测定。进行了加料回收和精密度实验 ,回收率在 94%～ 113%之间 ,RSD<10 %。被分析元素的检出限为 0 .0 1～ 0 .2 0 ng/ m L,测定下限为1～ 2 0 μg/ g。
In this paper, 14 kinds of non-rare earth impurities such as Mg, Al, Ti, Cr, Mo, Mn, Co, Ni, Cu, Zn, Pb, W, Nb and Ta in rare earth metals were studied by ICP- The matrix effect of each rare earth matrix on the analyzed elements was studied, and the matching internal standard elements were selected. The results of the standard curve method and standard addition method are compared. Determine the use of internal standard element matrix correction and instrument drift, measured directly with the standard curve method. Feed recovery and precision experiments were carried out, the recovery was 94% ~ 113%, RSD <10%. The detection limit of the analyte was 0.010 ~ 0.2 ng / mL, and the lower limit of determination was 1-200 μg / g.