岩石中硼的提取分离及同位素组成的测定  

Extraction and Separation of Boron in Rock Samples and Its Isotopic Determination by Thermal Ionization Mass Spectrometry

作　　者：王刚[1] 肖应凯[1] 王蕴慧[1] 魏海珍[1] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008

出　　处：《岩矿测试》2000年第3期169-172,共4页Rock and Mineral Analysis

基　　金：国家自然科学基金!资助项目 (2 9775 0 2 8)

摘　　要：介绍了一种用Na2 CO3+K2 CO3 混合熔剂对岩石样品进行分解 ,用硼特效树脂和阴、阳混合离子交换树脂相结合进行岩石样品中硼的纯化分离的方法。采用该方法从岩石样品中提取、分离出来的硼能满足硼同位素质谱法测定的需要 ,不产生硼同位素分馏 ,硼同位素测定精度大多优于 0 .0 5%。A method for isotopic determination of boron in rock samples was developed in this study. The rock samples were decomposed with the mixture of Na 2CO 3 and K 2CO 3. Boron in sample was then purified by ion exchange with Amberlite IRA 743 resin and the mixture of cation exchange resin (H + form) and anion exchange resin (ion exchanger Ⅱ, HCO - 3 form). The sample pretreatment method can meet the requirement of boron isotopic determination by thermal ionization mass spectrometry without any isotopic fractionation of boron. The precision for boron isotopic determination is better than 0.05% RSD.

关 键 词：硼 岩石分解 离子交换 同位素测定 

分 类 号：P584[天文地球—岩石学]