摘要
建立了氢氧化铟共沉淀预富集 -电感耦合等离子体质谱法测定河口水体中痕量稀土元素的方法。实验结果表明 ,在80mg·L -1的In3 +和pH9.5的实验条件下 ,在1.0L水样中添加5.0~200.0ng的混合稀土标准溶液 ,均能定量回收 ,回收率在82.2 %~106.9 %之间。方法的分析流程空白为0.04(Tb)~10.17(La)ng·L -1,检出限在0.17(Yb)~1.46(La)ng·L-1之间 ,精密度 (RSD ,n=3)小于11.7 % 。
Amethod for the determination of rare earth elements(REEs)in estuarine water by inductively couˉpled plasma mass spectrometry(ICP-MS)using In(OH) 3 co-precipitation for pre-concentration has been deˉveloped.The optimized amount of In 3+ for the precipitation of the analytes in1.0L water sample was80mg at pH9.5.The recoveries were88.9%~106.9%by spiking5~200ng REEs standards into1.0L water sample.The blank values of the developed method ranged from0.04ng·L -1 for Tb to10.17ng·L -1 for La.The detection limits of the REEs ranged from0.17ng·L -1 (Yb)to1.46ng·L -1 (La)and the relative standard deviations were1.2%~11.7%(n=3).The developed method has been used for the determinaˉtion of REEs in Yangze estuarine water samples.
出处
《分析测试学报》
CAS
CSCD
北大核心
2005年第1期12-16,共5页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目 (40076023)
关键词
河口水体
稀土元素
共沉淀预富集
电感耦合等离子体质谱
Estuarine water
Rare earth elements
Co-precipitation
Inductively coupled plasma mass spec- trometry