摘要
本文采用过氧化钠（Na<sub>2</sub>O<sub>2</sub>）熔样,743阳离子交换树脂快速分离,0.4mol/L柠檬酸25ml洗脱稀土,无需浓缩,即可用lCPS-PGS2单道扫描直读光谱仪直接测定15个微量稀土元素。在选择的最佳测量条件下,本法测定下限为0.005<sup>g</sup>/ml（Eu）-0.50μg/ml（Ce）,标准加入回收在88％—110％之间,样品分析精度为3.3％—17％,样品分析结果与参考值相符。本法适用于一般地质样品中微量稀土元素的例行分析。
A method for separation of trace amounts of REE in geological samples with sequential ICP-AES determination (ICPS-PGS2 spectrometer) is described. The gological samples are fused with sodium peroxides(Na_2O_2)and treated by EDTA triethenolamine aqueous solution, the REE are separated by 743 cation exchange resin and eluted by 25 ml 0.4 mol/L citric acid and then detected on ICPS-PGS2 spectrometer with single channel scanning mode. The detection limits are from 0.005 μg/ml to 0.50 μg/ml and the results of analysis of some GSD standard samples by this method are in good agreement with the reference values,the recoveries of standard addition are between 88％ to 110％ and precision is 3.3％—17％. This method is well suited for determination of 15 trace REE of geological samples.
出处
《铀矿地质》
CAS
CSCD
北大核心
1993年第3期50-57,共8页
Uranium Geology
