Journal Article

FZJ-2016-03201

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chemical stability of levoglucosan: An isotopic perspective

Sang, X. F.FZJ* ; Gensch, I. (Corresponding author)FZJ* ; Kammer, B.FZJ* ; Khan, A.FZJ* ; Kleist, E.FZJ* ; Laumer, W.FZJ* ; Schlag, P.FZJ* ; Schmitt, S.FZJ* ; Wildt, J.FZJ* ; Zhao, R. ; Mungall, E. L. ; Abbatt, J. P. D. ; Kiendler-Scharr, A.FZJ*

2016
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/16072  doi:10.1002/2016GL069179

Abstract: 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.

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Contributing Institute(s):

1. Troposphäre (IEK-8)
2. Pflanzenwissenschaften (IBG-2)

Research Program(s):

1. 243 - Tropospheric trace substances and their transformation processes (POF3-243) (POF3-243)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2016

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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