岩石样品快速Hf分离与MC-ICPMS同位素分析:一个改进的单柱提取色谱方法  

Rapid separation of Hf from rock samples for isotope analysis by MC-ICPMS: A modified single-column extraction chromatography method

作　　者：李献华[1] 祁昌实[1] 刘颖[1] 梁细荣[1] 涂湘林[1] 谢烈文[2] 杨岳衡[2] 

机构地区：[1]中国科学院广州地球化学研究所同位素年代学和地球化学重点实验室,广东广州510640 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球化学》2005年第2期109-114,共6页Geochimica

基　　金：中国科学院知识创新工程领域前沿项目(GIGCX-03-06);国家自然科学基金重点项目(40334039)~~

摘　　要：建立了一个改进的单柱Ln-Spec提取色谱分离Hf方法。用该方法可以有效地分离出岩石样品的基体元素、REE和干扰元素等,并使Hf的回收率>90%、本底<5×10-11g。用该方法对一些国际和国家岩石标样进行了Hf分离,采用单聚焦和双聚焦两种型号的MC-ICPMS测定了Hf同位素组成,国际标样的结果与文献值在误差范围内完全一致,国家标样的Hf同位素结果具有很好的外部重现性。A modified single-column Ln-Spec extraction chromatography method is developed for separation of Hf from rock samples. Using this method, hafnium can be effectively separated from the major and rare earth elements as well as the interference elements in the rock samples, with recovery of > 90%and whole procedure blank of < 5×10-11 g for Hf. A number of international and national rock standards were analyzed for Hf isotopic compositions using both single-and double-focus multiple collector-inductively coupled mass spectrometers. While the analytical results for the international rock standards are identical with those reference values within analytical errors, the external precision for the national rock standards is in good agreement.

关 键 词：提取色谱法 HF同位素 多接收器等离子体质谱 

分 类 号：P597[天文地球—地球化学]