| 摘要: |
| 汞同位素技术是汞的生物地球化学循环和污染防治研究的重要手段，在汞的源解析和过程示踪等方面具有广泛应用。由于自然环境中汞含量极低，所以环境样品需先经过一系列严苛的预处理才能开展汞同位素分析。目前，用于同位素分析的固态样品前处理方法主要有湿法消解和燃烧捕集法，液态样品的前处理方法以色谱分离、共沉淀和吹扫捕集为主，气态样品则收集至不同的固态吸附剂后，通过燃烧捕集法富集样品中的汞。相比湿法消解，燃烧捕集法具有富集倍数高、干扰元素少、适用范围广、操作简便等优点，广泛应用于土壤、岩石和大气等样品的前处理中。海水样品的前处理以共沉淀的效率最高，而吹扫捕集能富集海水中不同形态的汞。为拓展汞同位素技术在汞的生物地球化学循环研究中的应用，亟需建立更加快捷、高效的前处理技术。 |
| 关键词: 海洋化学 汞 汞同位素 吹扫捕集 燃烧捕集 |
| DOI：10.3969/J.ISSN.2095-4972.20220107002 |
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| 基金项目:福建省自然科学基金（2020J05074）；国家重点研发计划（2019YFD0901100） |
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| Advance in pretreatment methods of mercury isotope in environmental samples |
| ZHANG Yuanbiao,L Supeng,HUANG Shuyuan,WANG Lianghui |
| (Key Laboratory of Global Change and MarineAtmospheric Chemistry, Third Institute of Oceanography, MNR, Xiamen 361005, China) |
| Abstract: |
| Mercury isotope technology is an important means for the study of mercury biogeochemical cycle and pollution prevention and control and has wide applications in mercury source analysis and process tracing. However, due to the extremely low mercury content in the natural environment, environmental samples need to be pretreated by a series of rigorous methods for mercury isotope analysis. At present, wet digestion and combustion-trapping are two main pretreatment methods for solid samples, the pretreatment methods for liquid samples are mainly chromatographic separation and purge-and-trap. The gaseous samples are collected by various solid adsorbents before pretreatment with combustion-trapping method. The pretreatment methods for mercury analysis in various environmental media samples are summarized in this paper and the advantages and disadvantages of each method compared. In order to expand the application of mercury isotope technology in the study of mercury biogeochemical cycle, it is urgent to establish a faster and more efficient pretreatment technology. |
| Key words: marine chemistry mercury mercury isotopes purge-and-trap combustion-trapping |
