高纯金属镨中痕量稀土杂质的电感耦合等离子体原子发射光谱分析及光谱干扰的校正

本文提出了PGS-2型平面光栅光谱仪(色散率0.18纳米,二级光谱)与PlasmaTherm ICP-5000D射频发生器联用,乙醇预去溶方式进样,同时直接测定高纯金属镨中5个痕量稀土杂质元素的方法。并讨论了基体浓度对检出限的影响以及光谱干扰及其校正方法。当样品溶液中镨的浓度为5毫克/毫升时,测定下限分别为镧、钕和钐0.002%,铈0.003%和钇0.0005%。获得了良好的实验结果,其相对标准偏差为1.2-6.2%。

Determination of Trace Rare Earth Impurities in High Purity Metallic Praseodymium by Inductively Coupled Plasma Atomic Emission Spectrometry and Correction of Spectral Interferences

In this paper, direct simultaneous determination of five trace rare earth impurities in high purity metallic praseodymium is described, using a PGS-2 plate grating spectrograph equipped with Plasma Therm ICP-5000D radio frequency generator. The sample solution containing ethanol as a solvate was introduced into the ICP with desolvation. The effect of matrix concentrations on detection limits; the correction for spectral interferences between in each of the rare earch elements are described. When the concentration of Pr in the sample solution is 5mg/ml, determination limits were 0.002% for La, Nd and Sm, 0.003% for Ce, 0.0005% for Y. The determination accuracies were satisfactory and the relative standard deviations were in the range 1.2-6.2%.