% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Gkatzelis:856151,
      author       = {Gkatzelis, Georgios and Hohaus, Thorsten and Tillmann, Ralf
                      and Gensch, Iulia and Müller, Markus and Eichler, Philipp
                      and Xu, Kang-Ming and Schlag, Patrick and Schmitt, Sebastian
                      H. and Yu, Zhujun and Wegener, Robert and Kaminski, Martin
                      and Holzinger, Rupert and Wisthaler, Armin and
                      Kiendler-Scharr, Astrid},
      title        = {{G}as-to-particle partitioning of major biogenic oxidation
                      products: a study on freshly formed and aged biogenic {SOA}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {18},
      number       = {17},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2018-05787},
      pages        = {12969 - 12989},
      year         = {2018},
      abstract     = {Secondary organic aerosols (SOAs) play a key role in
                      climate change and air quality. Determining the fundamental
                      parameters that distribute organic compounds between the
                      phases is essential, as atmospheric lifetime and impacts
                      change drastically between the gas and particle phase. In
                      this work, gas-to-particle partitioning of major biogenic
                      oxidation products was investigated using three different
                      aerosol chemical characterization techniques. The aerosol
                      collection module, the collection thermal desorption unit,
                      and the chemical analysis of aerosols online are different
                      aerosol sampling inlets connected to a proton-transfer
                      reaction time-of-flight mass spectrometer (ACM-PTR-ToF-MS,
                      TD-PTR-ToF-MS, and CHARON-PTR-ToF-MS, respectively, referred
                      to hereafter as ACM, TD, and CHARON). These techniques were
                      deployed at the atmosphere simulation chamber SAPHIR to
                      perform experiments on the SOA formation and aging from
                      different monoterpenes (β-pinene, limonene) and real plant
                      emissions (Pinus sylvestris L.). The saturation mass
                      concentration C* and thus the volatility of the individual
                      ions was determined based on the simultaneous measurement of
                      their signal in the gas and particle phase.A method to
                      identify and exclude ions affected by thermal dissociation
                      during desorption and ionic dissociation in the ionization
                      chamber of the proton-transfer reaction mass spectrometer
                      (PTR-MS) was developed and tested for each technique. Narrow
                      volatility distributions with organic compounds in the
                      semi-volatile (SVOCs – semi-volatile organic compounds) to
                      intermediate-volatility (IVOCs – intermediate-volatility
                      organic compounds) regime were found for all systems
                      studied. Despite significant differences in the aerosol
                      collection and desorption methods of the
                      proton-transfer-reaction (PTR)-based techniques, a
                      comparison of the C* values obtained with different
                      techniques was found to be in good agreement (within 1 order
                      of magnitude) with deviations explained by the different
                      operating conditions of the PTR-MS.The C* of the identified
                      organic compounds were mapped onto the two-dimensional
                      volatility basis set (2D-VBS), and results showed a decrease
                      in C* with increasing oxidation state. For all experiments
                      conducted in this study, identified partitioning organic
                      compounds accounted for $20–30\%$ of the total organic
                      mass measured from an aerosol mass spectrometer (AMS).
                      Further comparison between observations and theoretical
                      calculations was performed for species found in our
                      experiments that were also identified in previous
                      publications. Theoretical calculations based on the
                      molecular structure of the compounds showed, within the
                      uncertainties ranges, good agreement with the experimental
                      C* for most SVOCs, while IVOCs deviated by up to a factor of
                      300. These latter differences are discussed in relation to
                      two main processes affecting these systems: (i) possible
                      interferences by thermal and ionic fragmentation of higher
                      molecular-weight compounds, produced by accretion and
                      oligomerization reactions, that fragment in the m∕z range
                      detected by the PTR-MS and (ii) kinetic influences in the
                      distribution between the gas and particle phase with
                      gas-phase condensation, diffusion in the particle phase, and
                      irreversible uptake.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243)},
      pid          = {G:(DE-HGF)POF3-243},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000444187300002},
      doi          = {10.5194/acp-18-12969-2018},
      url          = {https://juser.fz-juelich.de/record/856151},
}