Determination of Lithium in High Salinity Samples by Inductively Coupled Plasma Optical Emission Spectrometry(ICP-OES)
作者单位：College of Chemical Engineering and Materials ScienceTianjin University of Science and Technology Central Laboratory of Geological Mineral Exploration and Development Bureau of Tibet Autonomous Region
会议名称：《中国化学会第七届全国热分析动力学与热动力学学术会议》
会议日期：2019年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学]
关 键 词：Lithium High salinity sample ICP-OES Interference
摘 要：Lithium is an important strategic metal and new energy material,and its development and utilization attract extensive attention *** are huge amount of lithium resources in high salinity brines especially in salt lake and underground *** is necessary to accurately determine lithium content during the development of these ***,high concentrations of Na,K,Caand Mgin brines will result in serious interference with the determination of trace *** coupled plasma optical emission spectrometry (ICP-OES) has the ability of multi-element simultaneous analysis with wide linear *** order to realize swift and accurate determination of lithium in brines,the analysis of lithium in high salinity samples by ICP-OES was carried out in detail in this *** showed that lithium has a higher signal to noise ratio at 610.364 nm,where no obvious spectral line interferences of Na,K,Ca,Mgand argon were presented for the determination of ***,large amount of Na,Kand Mgcoexisting in the high salt brine samples would lead to positive matrix interferences,while the Cacaused negative *** internal standard method which is widely used to eliminate matrix interferences could not effectively solve this problem using whether yttrium or scandium as an internal standard *** the standard addition method involves complex operations and is not suitable for batch sample analysis,while the matrix matching method must match these interfering components with corresponding ions and thus is not suitable for the analysis of batch samples with different matrix compositions,the feasibility to match complex matrix with a single component was investigated in this *** Cl widely exists in brines and has obviously sensitizing effect on lithium determination,we found after a series of studies that when the total amounts of NaCl,KCl,MgCl in samples were no more than 40g/L,the interferences of these coexisting ions could be su