摘要
地质样品中卤素是反演与流体和挥发分相关的地质过程的重要示踪元素.由于卤素含量低和强挥发性,准确测定地质样品中卤素一直是分析地球化学的难点.近年来,针对地质样品卤素的样品前处理技术的开发开展了大量工作.高温热解法、碱熔(溶)法、酸性消解法和碱性提取法能够满足土壤、沉积物和岩石中高含量卤素的分析要求.针对低含量卤素,仅有中子活化法和稀有气体质谱法能够准确定量.随着分析地球化学的发展,地质样品卤素分析技术逐渐向更高效的消解方法、更简便的操作以及更高灵敏度和高精度的分析方向改进.总结了近年来国内外在地质样品卤素分析方面所取得的成果,对比了各类方法的优缺点,展望了地质样品卤素分析方法的发展前景.
Halogen in geological materials is the key tracer for the fluid/volatile related geological processes. Due to low concentration of halogens and high volatility, it is a challenge for the analysis of halogens in geological materials. Many studies on sample preparation for the analysis of halogens in geological materials have been reported in the last decade. Pyrohydrolysis, alkali fusion, acid digestion and alkali extraction are suitable for the high concentrations of halogens in soils, sediments and most of rocks. Only neutron activation analysis and noble gas technique can be utilized to analyze the low concentrations of halogens in geological materials. With the development of earth science and the analytical geochemistry, the future analysis of halogens will be more effective, more convenients and with higher sensitivity and precision are the future of the analysis of halogens. In this study,we reviewed the development of analysis techniques for halogens and compares the advantages and drawbacks between different methods. Finally, a perspective of the development of analytical method for halogens in geological materials are given.
作者
何焘
汪在聪
胡兆初
He Tao;Wang Zaicong;Hu Zhaochu(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430078,China;School of Earth Sciences,China University of Geosciences,Wuhan 430074,China)
出处
《地球科学》
EI
CAS
CSCD
北大核心
2021年第12期4452-4469,共18页
Earth Science
基金
国家自然科学基金面上项目(No.41873029)。
关键词
卤族元素
地质样品
样品前处理
分析方法
地球化学
halogen
geological material
sample preparation
analytical method
geochemistry
