MC-ICP MS测定富钴结壳中的铜锌同位素的化学分离方法研究  

Separation of Cu and Zn in Cobalt-rich Crusts for Isotope Determination by MC-ICP MS

作　　者：何连花[1] 刘季花[1] 张俊[1] 张辉[1] 高晶晶[1] 崔菁菁[1] 张颖[1] 

机构地区：[1]国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室,山东青岛266061

出　　处：《分析测试学报》2016年第10期1347-1350,共4页Journal of Instrumental Analysis

基　　金：山东省自然科学基金资助项目(ZR2014DP009);国际海底区域资源研究开发十二五规划项目(DY125-13-R-07)

摘　　要：建立了富钴结壳中Cu和Zn同位素的化学分离方法。采用新型阴离子交换树脂AG MP-1M,分别以8.2 mol/L HCl+0.01%HF+0.001%H_2O_2,2 mol/L HCl+0.001%H_2O_2和0.5 mol/L HNO_3作为淋洗液,能有效分离富钴结壳中的Cu,Co,Fe和Zn,且Cu和Zn的回收率均接近100%。同位素标准溶液在离子交换分离前后同位素组成一致,表明分离前后Cu和Zn没有分馏。全流程空白小于5 ng。此方法可作为多接收器电感耦合等离子体质谱仪高精度测定富钴结壳Cu和Zn同位素的方法。An optimized chemical separation and purification method for measuring Cu and Zn isotopic composition in cobalt-rich crusts was established. A new type of anion exchange resin, AG MP -1M, was successfully applied in the chemical separation of Cu, Co, Fe and Zn from cobalt-rich crusts. Cu, Co, Fe and Zn were separated using 8.2 mol/L HCl＋0. 01% HF ＋0. 001% H2O2, 2 mol/L HCl ＋0. 001% H2O2 and 0. 5 mol/L HNO3 as eluents. The recoveries for Cu and Zn were both close to 100%. No mass fractionation during the chemical separation procedure was observed. This method could be applied in the separation of Cu and Zn in Co-rich crusts for high-precision iso- tope analysis using MC -ICP MS.

关 键 词：富钴结壳 多接收器电感耦合等离子体质谱 Cu同位素 Zn同位素 

分 类 号：O657.63[理学—分析化学] O614.12[理学—化学]