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@ARTICLE{Laitinen:20015,
      author       = {Laitinen, T. and Ehn, M. and Junninen, H. and Ruiz-Jimenez,
                      J. and Parshintsev, J. and Hartonen, K. and Riekkola, M.-L.
                      and Worsnop, D.R. and Kulmala, M.},
      title        = {{C}haracterization of organic compounds in 10- to 50-nm
                      aerosol particles in boreal forest with laser desorption
                      -ionization aerosol mass spectrometer and comparison with
                      other techniques},
      journal      = {Atmospheric environment},
      volume       = {45},
      issn         = {1352-2310},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-20015},
      pages        = {3711 - 3719},
      year         = {2011},
      note         = {The financial support of the Academy of Finland Centre of
                      Excellence program (project no 1118615) is gratefully
                      acknowledged. The authors thank Pekka Tarkiainen, Janne
                      Levula, Toivo Pohja and all those at the SMEAR II station
                      who helped with the measurements. Mikko Aijala is thanked
                      for the Aerodyne AMS data handling and Sampsa Laine from
                      Data Rangers for assistance in data analysis.},
      abstract     = {The aim of this study was to characterize the organic
                      composition of ambient ultrafine particles (< 50 nm) in a
                      boreal forest environment and compare the analytical results
                      obtained by different techniques with use a data analysis
                      software. In the chromatographic techniques, particles were
                      collected on a filter and analyzed off-line after sample
                      preparation, whereas in the aerosol MS, particle analysis
                      was performed directly from the particle source.Many
                      compounds and chemical groups were identified with a laser
                      aerosol mass spectrometer (laser AMS) and selected organic
                      compounds, including acids, polyols, amines and aldehydes,
                      from 50 nm filter samples were quantified. Interesting
                      components found with the laser AMS included oxygenated and
                      aliphatic hydrocarbons, aromatic compounds, amines, and
                      black carbon. The amines found on laser AMS may be related
                      to new particle formation events at particle sizes 10-25 nm.
                      Correlations between the results obtained with different
                      instruments were clarified, and the best correlations were
                      found between laser AMS and 50-nm size filter samples. There
                      were no correlations between the laser AMS data and
                      meteorological data or on-line measured gas phase compounds.
                      The black carbon found on laser AMS had moderate correlation
                      for levoglucosan found on all-sized filter samples. Finally,
                      the correlation analysis revealed that the information
                      obtained from sub-50-nm size range particles and results for
                      particles several times higher could not be directly
                      compared. (C) 2011 Elsevier Ltd. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Environmental Sciences / Meteorology $\&$ Atmospheric
                      Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000292436300008},
      doi          = {10.1016/j.atmosenv.2011.04.023},
      url          = {https://juser.fz-juelich.de/record/20015},
}