【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 % ,可满足河口淡水和海水样品中的痕量稀土元素定量分析的要求更多还原

【Abstract】 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.更多还原