DOI: 10.1016/j.atmosenv.2014.07.059
Scopus记录号: 2-s2.0-84908314508
论文题名: Micro-scale (μg) radiocarbon analysis of water-soluble organic carbon in aerosol samples
作者: Zhang Y ; -L ; , Liu J ; -W ; , Salazar G ; A ; , Li J ; , Zotter P ; , Zhang G ; , Shen R ; -R ; , Schäfer K ; , Schnelle-Kreis J ; , PrévÔt A ; S ; H ; , Szidat S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 97 起始页码: 1
结束页码: 5
语种: 英语
英文关键词: Aerosols
; Radiocarbon 14C
; Source
; Water-soluble organic carbon
Scopus关键词: Aerosol samples
; Radiocarbon <sup>14</sup>C
; Radiocarbon analysis
; Source
; Water-soluble organic carbon
; Aerosols
; carbon 14
; carbon dioxide
; organic carbon
; unclassified drug
; water soluble organic carbon
; aerosol
; biomass burning
; carbon dioxide
; carbon isotope
; combustion
; organic carbon
; aerosol
; Article
; biomass
; chemical analysis
; combustion
; extraction
; fossil
; freeze drying
; human
; sensitivity analysis
; winter
; Asia
; Europe
; United States
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Radiocarbon (14C) measurement of water-soluble organic carbon (WSOC) in ambient aerosols is a quantitative tool for unambiguously distinguishing fossil and non-fossil sources. In this study, a fast and reliable method for measuring 14C in micro-scale (μg) WSOC aerosol samples is successfully developed, which includes three steps: (1) extraction (2) freeze drying, and (3) online 14C analysis of CO2 from WSOC combustion. Procedure blanks are carefully assessed by measuring high-purity water and reference materials. Accurate 14C results could be obtained for WSOC with only 10μgC, and thus the potential applications are substantially broadened because much less filter material is needed compared to previous reported methods. This method is applied to aerosols samples collected during winter from Switzerland and China. The results demonstrate that non-fossil sources are important if not dominant contributors of WSOC. These non-fossil components are consistently enriched in WSOC compared to bulk OC and water-insoluble OC for all samples, due to high water solubility of primary and secondary biomass burning aerosols. However, the presence of fossil WSOC is still considerable indicating a substantial contribution of secondary OC (SOC) formed from precursors emitted by fossil emissions. Larger fossil contributions to WSOC is found in China than in Switzerland and previously reported values in Europe, USA and South Asia, which may be attributed to higher fossil-derived SOC formation in China. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80577
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry and Biochemistry, University of Bern, Berne, Switzerland; Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen-PSI, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Berne, Switzerland; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Institute of Meteorology and Climate Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Garmisch-Partenkirchen, Germany; Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Joint Mass Spectrometry Centre, Cooperation Group Comprehensive Molecular Analytics, Neuherberg, Germany
Recommended Citation:
Zhang Y,-L,, Liu J,et al. Micro-scale (μg) radiocarbon analysis of water-soluble organic carbon in aerosol samples[J]. Atmospheric Environment,2014-01-01,97