电感耦合等离子体串联质谱法测定高纯氧化钆中20种痕量元素含量

Determination of 20 Trace Elements in High Purity Gadolinium Oxide by Inductively Coupled Plasma-tandem Mass Spectrometry

建立了电感耦合等离子体串联质谱法(ICP-MS/MS)直接测定高纯氧化钆中20种痕量元素含量的分析方法。在优化的实验条件下,分别采用He碰撞模式和NH_(3)原位质量模式消除了Fe、As、Yb、Lu受到的质谱干扰,考察了基体效应以及不同内标元素的校正效果,方法定量限在0.003~0.63μg/g之间,RSD(n=7)≤5%,加标回收率在90%~115%之间。本方法可以用于高纯氧化钆中包括Yb和Lu在内的痕量元素含量的直接测定。

An analytical method was proposed to determine 20 impurity elements in high pure gadolinium oxide by inductively coupled plasma-tandem mass spectrometry.This work was finished under optimal conditions.He collision mode and NH_(3) in-situ mass mode were used to eliminate mass interference of Fe,As,Yb and Lu contents.Matrix effect and correction results of different internal standards were investigated.The limits of quantitation for each element were 0.003~0.63μg/g,and the relative standard deviation(RSD,n=7)was≤5%.The recoveries for the testing spiked samples were between 90%and 115%.This method can be used to measure trace element contents in high purity gadolinium oxide directly,including Yb and Lu.