摘要
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,we have studied the simultaneous determination method for 14 non-rare earth impurities(Mg,Al,Ti,Cr,Mo,Co,Ni,Cu,Zn,Pb,W,Nb and Ta)in rare earth metals by ICP-MS.The matrix effect and the fluctuation from instrument are investigated.This determination is handled by external standard calibration.We also perform the recovery of standard addition and precision test.Recoveries were 94% to 113% with relative standard deviation<10%.The detection value of analysed elements is present to 0.01~0.2ng/mL and the limit of detection is 1~20μg/g.
出处
《稀土》
EI
CAS
CSCD
北大核心
2002年第2期34-39,54,共7页
Chinese Rare Earths
