海洋科学2017，Vol.41Issue(9)：34-40,7.DOI:10.11759/hykx20170315001
离线固相萃取螯合富集分离-ICP-MS测定海水中的稀土元素
Determination of trace rare earth elements in seawater by ICP-MS with solid-phase extraction treatment off-line
摘要
Abstract
In this paper, by optimizing the measurement conditions and comparing methods, we determined the presence of 14 trace rare earth elements in seawater by inductively coupled plasma mass spectrometry with solid-phase extraction treatment off-line. The seawater was pumped into a VAC ELUT SPS24 solid-phase extraction device after adjusting the pH value. The removal rate of the main matrix elements in seawater was higher than 97％. We determined the optimum conditions for solid-phase extraction to be of 4.0–7.0 pH value, 2 mL/min sample flow rate, and 1 mol/L nitrate elution concentration. The recovery rate by this method was in the range 83％–108％, and the relative standard deviations (RSDs) were less than 10％. The detection limit of 14 rare earth elements was in the range 0.057–0.613 ng/L. The method proposed in this paper is consistent with the iron hydroxide co-precipitation method for rare earth elements enrichment. The proposed method has high accuracy, good precision, and simple operation, which will meet the requirements for the determination of rare earth elements in seawater.关键词
稀土元素/固相萃取/富集分离/ICP-MS测定/海水Key words
rare earth elements/solid-phase extraction/enrichment and separation/ICP-MS determination/seawater分类
化学化工引用本文复制引用
刘瑶,宋金明,林强,于颖,孙玲玲,温廷宇..离线固相萃取螯合富集分离-ICP-MS测定海水中的稀土元素[J].海洋科学,2017,41(9):34-40,7.基金项目
国家自然科学基金项目(No. 41676068 （）
No. 41306070)资助 （）
National Natural Science Foundation of China, No. 41676068, No. 41306070 （）
