Determination of Rare Earth Elements in Geological Samples by Inductively Coupled Plasma Atomic Emission Spectrometry with Flow Injection Liquid-liquid Extraction

作     者：Zhifang Xu,~(*+) Congqiang LIU,~(**) Hongxiang ZHANG,~* Yingjun MA,~* and Soulin LIN~(***) *Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029, People’s Republic of China **Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,People’s Republic of China ***Department of Applied Chemistry,China University of Geosciences,Wuhan 430074, People’s Republic of China 

会议名称：《中国科学院地质与地球物理研究所2003学术年会》

会议日期：2003年

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：supported financially by the Chinese Academy of Sciences(Innovation Project No.KZCX2-105) 

摘      要：A direct sampling with organic solvent extracts for simultaneous multi-element determination implemented with inductively coupled plasma atomic emission spectrometry(ICP-AES) associated with a flow injection liquid-liquid extraction(FI-LLE) sample preconcentration method was ***robustnessof the plasma discharge with tributyl phosphate(TBP) loading was diagnosed by using the MgⅡ279.55 nm and MgⅠ285.21 nm lines intensity ratio.A FI-LLE preconcentration system for rare earth elements(REEs)-nitrate-TBP was established by using a laboratory-designed phase *** these elements,an average sensitivity enhancement factor of 64 was obtained with respect to ICP-AES sampling with aqueous *** precision of the method was characterized by a relative standard deviation (%RSD) of 1.8 - 5.2%.A throughput of 27 samples per hour can be achieved with an organic solvent consumption of less than 200μl per *** results were obtained for the analysis of standard reference materials.