摘要
硼(B)有两个稳定的同位素10 B和11 B,二者之间相对质量差较大,因此在自然界存在显著的同位素分馏,其同位素组成变化可为认识地球大气、海洋和上层地壳之间的演化过程和相互作用提供重要线索。B同位素作为灵敏的地球化学示踪剂广泛应用于化学、地质、海洋、生物和医学等研究领域,而其同位素组成的高精度测定是一切研究的基础。近年来,由于B同位素测定技术突破性改进和创新,大大提高了同位素测定的精度,因此有必要对B同位素组成测定主流方法、主要应用领域和未来挑战进行综述。测试方法主要包括:热电离质谱法(TIMS)、电感耦合等离子体质谱法(ICP-MS)、多接收电感耦合等离子质谱法(MC-ICP-MS)、二次离子质谱法(SIMS)和激光剥蚀多接收电感耦合等离子体质谱法(LA-ICP-MS)。其中TIMS方法测试精度最高,能够达到0.01‰,而MC-ICP-MS测试效率高,目前成为B同位素测定的主流方法。这些测试方法分别面临不同的挑战:TIMS在分析过程中容易产生同质异位素的干扰,MC-ICP-MS容易受到记忆效应的影响,而SIMS和LA-MC-ICP-MS分析过程中存在标准物质缺乏、低含量样品精度有限及高含量样品重现性差等问题。同时对硼同位素在生物碳酸盐pH计、矿床学、核材料和盐湖资源等领域应用进行介绍,最后对硼同位素测定中存在问题和未来发展方向进行了综述。固体样品不同赋存状态、原位和单矿物的硼同位素分析研究将是未来硼同位素应用的发展方向。
Boron(B)possesses two stable isotopes,10 B and 11 B,which exhibit a substantial relative mass difference.This leads to significant isotopic fractionation in nature,and alterations in its isotopic composition offer crucial insights into the evolutionary processes and interactions between the Earth’s atmosphere,oceans,and upper crust.Consequently,B isotopes serve as sensitive geochemical tracers in various fields,including chemistry,geology,oceanography,biology,and medicine.High-precision determination of its isotopic composition forms the foundation of all related research.In recent years,the precision of isotope determination has been significantly enhanced due to breakthrough improvements and innovations in B isotope determination technology.Now the mainstream methods for B isotope composition determination,main application areas,and future challenges for determining B isotope composition were reviewed.The main methods include thermal ionization mass spectrometry(TIMS),inductively coupled plasma mass spectrometry(ICP-MS),multiple collector inductively coupled plasma mass spectrometry(MC-ICP-MS),secondary ion mass spectrometry(SIMS),and laser ablation multiple collector inductively coupled plasma mass spectrometry(LA-ICP-MS).Among these methods,the TIMS has the highest testing accuracy,reaching 0.01‰,while MC-ICP-MS has become the mainstream instrument for B isotope determination due to its high efficiency.Each of these testing methods presents unique challenges.TIMS is prone to homogeneous isotope interference during analysis,MC-ICP-MS is susceptible to the memory effect,and a lack of standard samples hinders SIMS and LA-MC-ICP-MS.At the same time,the application of B isotopes inδ11 B-pH proxy technology of marine biogenic carbonate,mineral deposits,nuclear materials,and salt lake resources was introduced.Finally,the existing problems and future development directions in B isotope determination were summarized.The B isotopes of solid samples with different occurrence states,in situ and single minerals will be the future direction.
作者
贺茂勇
张宁
文雪琴
程原原
郭钧桦
张晓琳
HE Maoyong;ZHANG Ning;WEN Xueqin;CHENG Yuanyuan;GUO Junhua;ZHANG Xiaolin(State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710000,China;Institute of Plateau Science and Sustainable Development,Qinghai Normal University,Xining 810016,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Earth Science and Resources,Chang’an University,Xi’an 710054,China)
出处
《东华理工大学学报（自然科学版）》
2023年第6期597-607,共11页
Journal of East China University of Technology(Natural Science)
基金
中国科学院战略性先导科技专项(B类)(XDB40000000)
陕西省杰出青年科学基金项目(2022JC-16)
国家自然科学基金面上项目(42173023)。
关键词
硼同位素组成
测定
进展
高精度
boron isotope composition
determination
progress
high precision
