电感耦合等离子体质谱法测定高纯氧化镧中铈含量  

Determination of Cerium Concentration in High-Purity Oxide Lanthanum by ICP-MS

作　　者：胡芳菲[1] 王长华[1] 李继东[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《质谱学报》2014年第4期330-334,共5页Journal of Chinese Mass Spectrometry Society

摘　　要：采用电感耦合等离子体质谱法（ICP-MS）测定了高纯La2O3中的Ce含量.选择同位素140Ce和142Ce进行测定,通过建立校正方程,分别考察了不同Nd含量的La2O3样品中140Ce和142Ce的质谱干扰情况和校正效果.结果表明,在Nd含量较高的情况下,142Ce的质谱干扰校正效果较差,回收率为-322％,RSD为173％,而140Ce的质谱干扰校正效果较好.因此,建立了Nd含量较高的La2O3中Ce含量的测定方法,140Ce的检出限为1.5 μg/g,相对标准偏差（RSD）在0.72％～1.6％之间,回收率为104％～106％.Ce concentration in high-purity La2 03 was determined by inductively coupled plas- ma mass spectrometry （ICP-MS）. Isotopes 140Ce and 142Ce were chosen to he determined. Correction equations were built to investigate the effect of Nd concentration in La2O3 on 140Ce and 142 Ce mass interferences and correction results. The results indicate that the correction effect of 142Ce mass interferences is bad when Nd concentration is high. The recovery is --322% and the RSD is 173%. While the correction effect of 140Ce mass interferences is very well. The method of Ce concentration determination in La20a is built, when Ce concentration is high. The detection limit of 140Ce is 1. 5 μg/g, the RSD is between 0.72% and 1.6% and the recovery is in the range of 104%--106%.

关 键 词：电感耦合等离子体质谱(ICP-MS) 氧化镧 干扰校正 铈 

分 类 号：O657.63[理学—分析化学]