Chemical characterisation of benzene oxidation products under high- and low-NOx conditions using chemical ionisation mass spectrometry

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http://hdl.handle.net/10138/328827

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Priestley , M , Bannan , T J , Le Breton , M , Worrall , S D , Kang , S , Pullinen , I , Schmitt , S , Tillmann , R , Kleist , E , Zhao , D , Wildt , J , Garmash , O , Mehra , A , Bacak , A , Shallcross , D E , Kiendler-Scharr , A , Hallquist , Å M , Ehn , M , Coe , H , Percival , C J , Hallquist , M , Mentel , T F & McFiggans , G 2021 , ' Chemical characterisation of benzene oxidation products under high- and low-NOx conditions using chemical ionisation mass spectrometry ' , Atmospheric Chemistry and Physics , vol. 21 , no. 5 , pp. 3473-3490 . https://doi.org/10.5194/acp-21-3473-2021

Title: Chemical characterisation of benzene oxidation products under high- and low-NOx conditions using chemical ionisation mass spectrometry
Author: Priestley, Michael; Bannan, Thomas J.; Le Breton, Michael; Worrall, Stephen D.; Kang, Sungah; Pullinen, Iida; Schmitt, Sebastian; Tillmann, Ralf; Kleist, Einhard; Zhao, Defeng; Wildt, Jürgen; Garmash, Olga; Mehra, Archit; Bacak, Asan; Shallcross, Dudley E.; Kiendler-Scharr, Astrid; Hallquist, Åsa M.; Ehn, Mikael; Coe, Hugh; Percival, Carl J.; Hallquist, Mattias; Mentel, Thomas F.; McFiggans, Gordon
Contributor: University of Helsinki, INAR Physics
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2021-03-05
Number of pages: 18
Belongs to series: Atmospheric Chemistry and Physics
ISSN: 1680-7316
URI: http://hdl.handle.net/10138/328827
Abstract: Aromatic hydrocarbons are a class of volatile organic compounds associated with anthropogenic activity and make up a significant fraction of urban volatile organic compound (VOC) emissions that contribute to the formation of secondary organic aerosol (SOA). Benzene is one of the most abundant species emitted from vehicles, biomass burning and industry. An iodide time-of-flight chemical ionisation mass spectrometer (ToF-CIMS) and nitrate ToF-CIMS were deployed at the Julich Plant Atmosphere Chamber as part of a series of experiments examining benzene oxidation by OH under high- and low-NOx conditions, where a range of organic oxidation products were detected. The nitrate scheme detects many oxidation products with high masses, ranging from intermediate volatile organic compounds (IVOCs) to extremely low volatile organic compounds (ELVOCs), including C-12 dimers. In comparison, very few species with C->= 6 and O-> 8 were detected with the iodide scheme, which detected many more IVOCs and semi-volatile organic compounds (SVOCs) but very few ELVOCs and low volatile organic compounds (LVOCs). A total of 132 and 195 CHO
Subject: 114 Physical sciences
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