MC-ICP-MS测定海洋沉积物中钕同位素的化学分离方法  

Chemical separation method for MC-ICP-MS determination of Nd isotopes in marine sediment

作　　者：何连花 张辉 刘季花 张颖 朱爱美 汪虹敏 HE Lianhua;ZHANG Hui;LIU Jihua;ZHANG Ying;ZHU Aimei;WANG Hongmin(Key Laboratory of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,Shandong,China;Environmental Function Laboratory for Marine Geology,National Laboratory of Marine Science and Technology(Qingdao),Qingdao 266061,Shandong,China)

机构地区：[1]自然资源部第一海洋研究所海洋沉积与环境地质重点实验室,山东青岛266061 [2]青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室,山东青岛266061

出　　处：《矿产与地质》2020年第5期1018-1022,共5页Mineral Resources and Geology

基　　金：山东省自然科学基金项目(No.ZR2014DP009);国际海域资源调查与开发“十三五”项目(No.DY135-N-1-03、No.DY135-C1-1-04)共同资助。

摘　　要：报道了多接收电感耦合等离子体质谱(MC-ICP-MS)高精度测定海洋沉积物钕同位素的化学分离方法。采用P507树脂和镧系树脂(LN),主要探讨了海洋沉积物样品Ce、Nd和Sm在这两种树脂上不同淋洗液体积、淋洗液浓度等分离条件下的分离行为。结果表明:P507树脂和LN树脂均能有效去除Sm的影响。P507树脂在去除Ce元素上更有优势。在完全去除Ce元素时,P507树脂Nd的回收率为100%,LN树脂Nd回收率为67%。LN树脂具有分离流程短、效率高的优点。两种树脂分离效果均能满足MC-ICP-MS高精度测定Nd同位素的要求。An optimized chemical separation and purification procedure for the determination of Nd isotopes in marine sediments by multiple collector inductively coupled plasma mass spectrometry(MC-ICP-MS)is reported.Using P507 resin and lanthanide resin(LN),the separation behavior of Ce,Nd and Sm in marine sediment samples under different eluent volumes and eluent concentrations on these two resins is mainly discussed.The result shows that both P507 resin and LN resin can effectively remove the influence of Sm element.P507 resin has more advantages in removing Ce element.When Ce element is completely removed,about 100%of Nd in the samples can be recovered by P507 resin and 67%of Nd can be recovered by LN resin.However,LN resin has the advantages of short separation procedure and high efficiency.The separation effect of the two resins can both meet the requirements of MC-ICP-MS for high-precision determination of Nd isotopes.

关 键 词：钕同位素 多接收电感耦合等离子体质谱 海洋沉积物 离子交换 

分 类 号：O657.63[理学—分析化学]