电感耦合等离子体原子发射光谱法及离子选择电极法测定荧光级氧化钇中痕量铈的研究  

Determination of Trace Cerium in Yttrium Oxide at Fluorescence Grade by Inductively Coupled Plasma Atomic Emission Spectrometry and Ion Selective Electrode Method

作　　者：吴金兰[1] 袁甫[1] 綦文娣[1] 

机构地区：[1]中国科学院长春应用化学研究所,长春市斯大林大街109号130022

出　　处：《光谱实验室》1993年第4期30-32,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：文章描述了荧光级氧化钇中痕量稀土铈的测定方法,在溴酸钾存在下,5摩尔/升HNO_3介质中,以P507萃取微量铈,然后有机相用硝酸、过氧化氢反萃取、再将水相浓缩定容,然后以电感耦合等离子体原子发射光谱法分析。同时用铈的离子选择电极以二次标准加入法作第二种手段分析。样品溶液以乙醇预去溶方式引入等离子体,测定下限为2微克/克,方法简单、快速、准确。离子选择电极法测定铈离子下限1×10～(-5)摩尔/升,回收率为94-101%,方法简单,结果满意、价格便宜。This paper describes determination method of trace rare earth cerium at fluorescence grade. Microcerium was extracted with P507 in potassium bromate and 5mol/L nitric acid. Organic phase was counterextracted with HNO_3 and H_2O_2. Water phase was concentrated and was quantitatived. This solu- tion was analyzed by inductively coupled plasma atomic emission spectro- metry. Cerium ion selective electrode double standard addition method was used as second analysis method. For inductively coupled plasma atomic emission spectrometry, the detection limit is 2 μg/g. This method is rapid and simple. The recovery is 94-101%. For the ion selective electrode method, the detection limits is 1×10_(-5)mol/L with satisfactory results.

关 键 词：氧化钇 离子选择电极 ICP-AES 

分 类 号：O614.322[理学—无机化学]