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本文采用乙醇预去溶方式进样,ICP-AES直接同时测定了>99.99%的高纯金属铈中5个痕量稀土杂质元素,并讨论了基体量对检测限的影响,稀土元素间的光谱干扰及其校正方法等。当样品溶液中铈的浓度为5mg/ml时,铈中稀土杂质元素的测定下限为:镧、钕和钇0.001%,镨和钐0.003%。其相对标准偏差为1.9～6.4%。
In this paper, ethanol was used to pre-dissolve the sample and ICP-AES was used to simultaneously determine five trace rare earth elements in> 99.99% high purity cerium. The influence of substrate amount on the detection limit, Interference and its correction methods. When the concentration of cerium in the sample solution is 5 mg / ml, the lower limit of determination of the rare earth impurity element in cerium is 0.001% of lanthanum, neodymium and yttrium, 0.003% of praseodymium and samarium. The relative standard deviation of 1.9 ~ 6.4%.