硼同位素分析方法研究进展

Advances in Boron isotope determinations

硼具有两种稳定同位素^(10)B和^(11)B,其在自然界的丰度分别是19.90%和80.10%。自然界硼同位素组成变化很大,δ^(11)B变化可达90‰以上(-30‰～+60‰)。硼同位素的分析精度优于0.2‰,因此被广泛应用于多种地质过程的示踪研究。近年来,硼元素的提取、分离纯化和仪器测定技术均取得了可喜的进展,分析精度不断提高,为硼同位素地球化学研究奠定了良好的基础。本文从样品分解、化学分离和仪器测定等方面对硼同位素分析测试方法进行了归纳总结。

Boron has two stable isotopes ^11B and ^11B,which have relative abundances of 19.90 % and 80. 10 % ,respectively. The range of δ^11B values in nature is wide and more than 90 ‰（ -30‰- ＋60‰）. Boron isotopes can be used to trace various geological processes on the basis of precision better than 0. 2 ‰ for the measurement. In recent years,it has been making great progresses in extraction, separation, purification and techniques for boron isotope determination with better precision,which provides a good base for the studies on boron isotope geochemistry. It is discussed the advances in sample preparation and summarized the recent trends in the determination of boron isotope.