有孔虫中硼的分离及其正热电离质谱法测定  

Separation and Isotopic Measurement of Boron in Foraminifera

作　　者：张崇耿[1] 肖应凯[1] 孙爱德[1] 王庆忠[1] 廖步勇[1] 

机构地区：[1]中国科学院青海盐湖研究所,西宁810008

出　　处：《分析化学》2003年第4期405-408,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金 (No .40 1730 13);同济大学海洋地质教育部重点实验室资助项目

摘　　要：针对大洋钻探计划 (ODP)钻孔中有孔虫数量少、硼含量低的特点 ,改进了硼特效树脂和阴、阳混合离子交换树脂相结合进行分离硼的方法 ,成功地实现了硼的分离 ,并且首次采用正热电离质谱法测定了有孔虫中硼同位素的比值。由于硼的分离过程不产生同位素分馏 。The method for the separation of boron was successfully improved, using boron specific resin ( Amberlite IRA 743) and the mixture of cation exchange resin (H+ form) and anion exchange resin (OH- form), with no isotopic fractionation. This method is suitable for the separation of boron in foraminifera with low content and a little source. The isotopic determination of boron in foraminifera has been completed by positive thermal ionization mass spectrometry based on the measurement of Cs2BO2+ ion with graphite loading. In the meantime, the results also show that boron separation for the isotopic measurement by both Amberlite IRA 743 resin and the mixed resin is more effective than the by Amberlite IRA 743 alone reported by the previous researchers. The improved procedure can also be applied to the boron separation and its isotopic measurement in river water samples.

关 键 词：硼同位素 有孔虫 分离 正热电离质谱 古生物碳酸盐 大洋钻探计划 

分 类 号：O657.63[理学—分析化学]