微波消解-电感耦合等离子体质谱法测定土壤中微量稀土元素  

Determination of Trace Rare Earth Elements in Soils by Inductively Coupled Plasma-Mass Spectrometry After Microwave Digestion for Sample Preparation

作　　者：曹心德[1] 王晓蓉[1] 尹明[2] 赵贵文[3] 

机构地区：[1]南京大学环境科学与工程系 [2]中国地质科学院岩矿测试技术研究所,北京100037 [3]中国科学技术大学化学系,合肥230026

出　　处：《分析化学》1999年第6期679-683,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金重大项目资助课题

摘　　要：研究了电感耦合等离子体质谱(ICP-MS)测定土壤中微量稀土元素(REEs)的方法.详细讨论了测定稀土元素的质谱干扰及基体的抑制效应,采用高斯消除法可有效地校正质谱干扰,内标法可以补偿基体的抑制效应.根据土壤标准参考物质(GSS-2,GSS-4)的分析结果评价方法的准确性.在微波条件下,HF+HCl+HNO_3+EDTA混合介质能快速而有效地分解土壤样品,直接稀释后用ICP-MS测定其中的稀土元素.实验表明:所建立的方法简便、准确、快速.Inductively coupled plasma-mass spectrometry (ICP-MS) has been employed to determine the rare earth elements(REEs) in soils. For the prompt sample decomposition, a microwave digestion was successfully used with a mixture of HF + HCl + HNO3+ EDTA. The potential of the method was evaluated by the detennination of REEs in Standard Reference Materials (GSS-2, GSS-4). The results agreed well with the certified values. The accuracy, dilution factors, spectroscopic interferences and matrix suppression effects were studied in detail. Precision was better than 5 % . The experimental results showed that the proposed method was simple, precise and accurate.

关 键 词：稀土元素 土壤 微波消解 测定 ICP MS 

分 类 号：S151.93[农业科学—土壤学]