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基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估

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钟广财, 刘頔, 李军, 张干. 基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估[J]. 环境化学, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
引用本文: 钟广财, 刘頔, 李军, 张干. 基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估[J]. 环境化学, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
shu
ZHONG Guangcai, LIU Di, LI Jun, ZHANG Gan. Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy[J]. Environmental Chemistry, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
Citation: ZHONG Guangcai, LIU Di, LI Jun, ZHANG Gan. Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy[J]. Environmental Chemistry, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
shu

基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估

  • 1.

    中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 510640

  • 基金项目:

    中国博士后科学基金(2014M552249)资助.

Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy

  • 1.

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China

  • Fund Project:

  • 摘要: 化石燃料燃烧和生物质燃烧是污染物多环芳烃(polycyclic aromatic hydrocarbon, PAHs)的两大来源.放射性碳(14C)分析近年用于评估这两类源对环境中PAHs的相对贡献.此方法基于化石燃料和生物质的14C含量差异,即化石燃料不含14C,而生物质的14C浓度有一个较稳定值.14C的自然丰度极低(约10-12),因此检测PAHs这样的痕量污染物的14C含量一度极具挑战.1990年代中期,加速器质谱的技术突破使得对环境样品PAHs的14C分析具有实用价值.要准确测出PAHs的14C含量,须先从化学成分复杂的环境样品中分离出高纯度的PAHs.制备气相色谱因其出色的分离能力而成为目前环境样品PAHs 14C分析必备的工具.本文意在简介基于14C分析的PAHs源解析的基本原理、技术进展,以及评估该方法获得的PAHs源解析结果的准确性.
    Abstract: Combustion of biomass and fossil fuel are two main sources of the pollutants polycyclic aromatic hydrocarbons (PAHs). Radiocarbon (14C) analysis recently has been applied to estimate relative contribution of the two sources. The method is based on the difference of 14C content in fossil fuel and biomass. Namely, fossil fuel is radiocarbon free, but contemporary biomass has a relatively stable 14C level. The extremely low natural abundance of 14C (about 10-12) once made it challenging to measure 14C content of trace pollutants like PAHs. 14C analysis became practical since mid-1990s due to the development of micro-scale accelerator mass spectrometer (AMS). For accurate 14C analysis, it is a prerequisite to harvest individual PAHs with high purity from the chemically complex environmental samples. Owing to its excellent separation efficiency, preparative capillary gas chromatography is currently an essential tool in PAHs 14C analysis of environmental samples. Fundamental and technical progresses of 14C-based PAHs source apportionment are introduced in this article, and accuracy of the method is also assessed.
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  • 收稿日期:  2014-11-11
  • 刊出日期:  2015-06-15
钟广财, 刘頔, 李军, 张干. 基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估[J]. 环境化学, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
引用本文: 钟广财, 刘頔, 李军, 张干. 基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估[J]. 环境化学, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
shu
ZHONG Guangcai, LIU Di, LI Jun, ZHANG Gan. Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy[J]. Environmental Chemistry, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
Citation: ZHONG Guangcai, LIU Di, LI Jun, ZHANG Gan. Source apportionment of polycyclic aromatic hydrocarbons based on radiocarbon analysis: Technical progresses and assessment of accuracy[J]. Environmental Chemistry, 2015, 34(6): 1025-1036. doi: 10.7524/j.issn.0254-6108.2015.06.2014111101
shu

基于放射性碳分析的多环芳烃源解析:技术进展和准确性评估

  • 1. 中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广州, 510640
  • 收稿日期:  2014-11-11
基金项目:

中国博士后科学基金(2014M552249)资助.

摘要: 化石燃料燃烧和生物质燃烧是污染物多环芳烃(polycyclic aromatic hydrocarbon, PAHs)的两大来源.放射性碳(14C)分析近年用于评估这两类源对环境中PAHs的相对贡献.此方法基于化石燃料和生物质的14C含量差异,即化石燃料不含14C,而生物质的14C浓度有一个较稳定值.14C的自然丰度极低(约10-12),因此检测PAHs这样的痕量污染物的14C含量一度极具挑战.1990年代中期,加速器质谱的技术突破使得对环境样品PAHs的14C分析具有实用价值.要准确测出PAHs的14C含量,须先从化学成分复杂的环境样品中分离出高纯度的PAHs.制备气相色谱因其出色的分离能力而成为目前环境样品PAHs 14C分析必备的工具.本文意在简介基于14C分析的PAHs源解析的基本原理、技术进展,以及评估该方法获得的PAHs源解析结果的准确性.

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