Highly oxygenated organic molecule cluster decomposition in atmospheric pressure interface time-of-flight mass spectrometers

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http://hdl.handle.net/10138/320666

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Zanca , T , Kubecka , J , Zapadinsky , E , Passananti , M , Kurten , T & Vehkamäki , H 2020 , ' Highly oxygenated organic molecule cluster decomposition in atmospheric pressure interface time-of-flight mass spectrometers ' , Atmospheric Measurement Techniques , vol. 13 , no. 7 , pp. 3581-3593 . https://doi.org/10.5194/amt-13-3581-2020

Title: Highly oxygenated organic molecule cluster decomposition in atmospheric pressure interface time-of-flight mass spectrometers
Author: Zanca, Tommaso; Kubecka, Jakub; Zapadinsky, Evgeni; Passananti, Monica; Kurten, Theo; Vehkamäki, Hanna
Contributor: University of Helsinki, INAR Physics
University of Helsinki, INAR Physics
University of Helsinki, INAR Physics
University of Helsinki, Department of Chemistry
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
Date: 2020-07-03
Language: eng
Number of pages: 13
Belongs to series: Atmospheric Measurement Techniques
ISSN: 1867-1381
URI: http://hdl.handle.net/10138/320666
Abstract: Identification of atmospheric molecular clusters and measurement of their concentrations by atmospheric pressure interface time-of-flight (APi-TOF) mass spectrometers may be affected by systematic error due to possible decomposition of clusters inside the instrument. Here, we perform numerical simulations of decomposition in an APi-TOF mass spectrometers and formation in the atmosphere of a set of clusters which involve a representative kind of highly oxygenated organic molecule (HOM), with the molecular formula C10H16O8. This elemental composition corresponds to one of the most common mass peaks observed in experiments on ozone-initiated autoxidation of alpha-pinene. Our results show that decomposition is highly unlikely for the considered clusters, provided their bonding energy is large enough to allow formation in the atmosphere in the first place.
Subject: 116 Chemical sciences
114 Physical sciences
BASIS-SETS
CHEMISTRY
NUCLEATION
OPTIMIZATION
STABILITY
SULFURIC-ACID
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