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@PHDTHESIS{Steitz:129276,
      author       = {Steitz, Bettina},
      title        = {{E}xperimental determination of the partitioning
                      coefficient of nopinone as a marker substance in organic
                      aerosol},
      volume       = {169},
      school       = {Universität Wuppertal},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2013-00792},
      isbn         = {978-3-89336-862-4},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {132 p.},
      year         = {2013},
      note         = {Dissertation, Universität Wuppertal, 2012},
      abstract     = {Atmospheric aerosols have a significant influence on the
                      radiation budget and chemical processes in the atmosphere.
                      Thus, they have an impact on climate. They are relevant in
                      many environmental processes and influence human health. In
                      many regions, secondary organic aerosol (SOA) makes a major
                      contribution to the total aerosol mass. Therefore, SOA
                      significantly influences aerosol properties. The complex and
                      versatile chemical composition of SOA makes the analysis of
                      its formation and chemical behavior difficult and thus
                      complicates global and local climate modeling. One major
                      issue in current models is the prediction of the organic
                      matter in the atmosphere. For this, a detailed understanding
                      of SOA formation from volatile organic compounds (VOCs) is
                      of importance. VOCs undergo oxidation in the atmosphere
                      which results in the formation of semivolatile organic
                      compounds. These partition between the gas and the particle
                      phase. The compoundspecific gas-to-particle partitioning can
                      be described with the temperature-dependent partitioning
                      coefficient. This work is dedicated to its experimental
                      determination. To this end, a new measurement technique for
                      compound-specific analysis of organic aerosol was used. The
                      Aerosol Collection Module (ACM) is a newly developed
                      instrument which collects aerosol particles, converts them
                      into the gas phase via thermal desorption and transfers them
                      to a gas phase detector for further analysis. In this work,
                      the ACM was coupled to a high-resolution Proton Transfer
                      Reaction-Time of Flight-Mass Spectrometer (PTR-ToF-MS)for
                      the first time and used in $\alpha$ -, and $\beta$-pinene
                      ozonolysis experiments at the AIDA chamber of the Karlsruhe
                      Institute of Technology (KIT). For the data analysis,
                      routines were developed based on Aerosol Mass Spectrometer
                      (AMS) data analysis. The partitioning coefficient of
                      nopinone, as the major $\beta$-pinene ozonolysis product,
                      and its temperature dependence was determined. For this
                      purpose, two experimental approaches were employed: the
                      coupling of ACM and PTR-ToF-MS, and measurements using the
                      PTRToF- MS with and without particle filter. The temperature
                      dependence of the partitioning coefficient derived from ACM
                      and PTR-ToF-MS was comparable to the theoretical temperature
                      dependence found in literature. A comparison with calculated
                      partitioning coefficients following theory showed that the
                      experimental partitioning coefficients of this work were
                      about one order of magnitude higher. This leads to the
                      conclusion that the amount of nopinone in the aerosol
                      particle phase is underestimated by theory. As literature on
                      experimentally derived partitioning coefficients is sparse,
                      further investigations of the partitioning coefficient of
                      other substances with the combination of ACM and PTR-ToF-MS
                      could help to improve the understanding of SOA formation
                      and, thus, SOA prediction.},
      keywords     = {Dissertation (GND)},
      cin          = {IEK-8},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {233 - Trace gas and aerosol processes in the troposphere
                      (POF2-233)},
      pid          = {G:(DE-HGF)POF2-233},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/129276},
}