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@ARTICLE{Hohaus:276179,
      author       = {Hohaus, Thorsten and Gensch, Iulia and Kimmel, Joel and
                      Worsnop, Douglas R. and Kiendler-Scharr, Astrid},
      title        = {{E}xperimental determination of the partitioning
                      coefficient of β-pinene oxidation products in {SOA}s},
      journal      = {Physical chemistry, chemical physics},
      volume       = {17},
      number       = {22},
      issn         = {1463-9084},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2015-06646},
      pages        = {14796 - 14804},
      year         = {2015},
      abstract     = {The composition of secondary organic aerosols (SOAs) formed
                      by β-pinene ozonolysis was experimentally investigated in
                      the Juelich aerosol chamber. Partitioning of oxidation
                      products between gas and particles was measured through
                      concurrent concentration measurements in both phases.
                      Partitioning coefficients (Kp) of 2.23 × 10−5 ± 3.20 ×
                      10−6 m3 μg−1 for nopinone, 4.86 × 10−4 ± 1.80 ×
                      10−4 m3 μg−1 for apoverbenone, 6.84 × 10−4 ± 1.52
                      × 10−4 m3 μg−1 for oxonopinone and 2.00 × 10−3 ±
                      1.13 × 10−3 m3 μg−1 for hydroxynopinone were derived,
                      showing higher values for more oxygenated species. The
                      observed Kp values were compared with values predicted using
                      two different semi-empirical approaches. Both methods led to
                      an underestimation of the partitioning coefficients with
                      systematic differences between the methods. Assuming that
                      the deviation between the experiment and the model is due to
                      non-ideality of the mixed solution in particles, activity
                      coefficients of 4.82 × 10−2 for nopinone, 2.17 × 10−3
                      for apoverbenone, 3.09 × 10−1 for oxonopinone and 7.74 ×
                      10−1 for hydroxynopinone would result using the vapour
                      pressure estimation technique that leads to higher Kp. We
                      discuss that such large non-ideality for nopinone could
                      arise due to particle phase processes lowering the effective
                      nopinone vapour pressure such as diol- or dimer formation.
                      The observed high partitioning coefficients compared to
                      modelled results imply an underestimation of SOA mass by
                      applying equilibrium conditions.},
      cin          = {IEK-8},
      ddc          = {540},
      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:000355633400055},
      doi          = {10.1039/C5CP01608H},
      url          = {https://juser.fz-juelich.de/record/276179},
}