globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069179
论文题名:
Chemical stability of levoglucosan: An isotopic perspective
作者: Sang X.F.; Gensch I.; Kammer B.; Khan A.; Kleist E.; Laumer W.; Schlag P.; Schmitt S.H.; Wildt J.; Zhao R.; Mungall E.L.; Abbatt J.P.D.; Kiendler-Scharr A.
刊名: Geophysical Research Letters
ISSN: 0094-9541
EISSN: 1944-9272
出版年: 2016
卷: 43, 期:10
起始页码: 5419
结束页码: 5424
语种: 英语
英文关键词: biomass burning ; kinetic isotope effect ; molecular marker ; stable carbon isotope ratio
Scopus关键词: Carbon ; Carrier mobility ; Chemical industry ; Chemical stability ; Chromatography ; Gas chromatography ; Kinetics ; Mass spectrometry ; Oxidation ; Rate constants ; Solutions ; Biomass-burning ; Chemical processing ; Gas chromatography-isotope-ratio mass spectrometries ; Heterogeneous oxidation ; Isotopic fractionations ; Kinetic isotope effects ; Molecular marker ; Stable carbon isotope ratio ; Isotopes
英文摘要: The chemical stability of levoglucosan was studied by exploring its isotopic fractionation during the oxidation by hydroxyl radicals. Aqueous solutions as well as mixed (NH4)2SO4-levoglucosan particles were exposed to OH. In both cases, samples experiencing different extents of processing were isotopically analyzed by Thermal Desorption-Gas Chromatography-Isotope Ratio Mass Spectrometry (TD-GC-IRMS). From the dependence of levoglucosan δ13C and concentration on the reaction extent, the kinetic isotope effect (KIE) of the OH oxidation reactions was determined to be 1.00187±0.00027 and 1.00229±0.00018, respectively. Both show good agreement within the uncertainty range. For the heterogeneous oxidation of particulate levoglucosan by gas-phase OH, a reaction rate constant of (2.67±0.03)·10−12 cm3 molecule−1S−1 was derived. The laboratory kinetic data, together with isotopic source and ambient observations, give information on the extent of aerosol chemical processing in the atmosphere. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978827367&doi=10.1002%2f2016GL069179&partnerID=40&md5=8eff531d3915baeabf3d741797406587
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10504
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: IEK-8, Forschungszentrum Jülich, Jülich, Germany

Recommended Citation:
Sang X.F.,Gensch I.,Kammer B.,et al. Chemical stability of levoglucosan: An isotopic perspective[J]. Geophysical Research Letters,2016-01-01,43(10).
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