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@ARTICLE{Wisthaler:59609,
      author       = {Wisthaler, A. and Apel, E. C. and Bossmeyer, J. and Hansel,
                      A. and Junkermann, W. and Koppmann, R. and Meier, R. and
                      Müller, K. and Solomon, S. J. and Steinbrecher, R. and
                      Tillmann, R. and Brauers, T.},
      title        = {{T}echnical {N}ote: {I}ntercomparison of formaldehyde
                      measurements at the atmosphere simulation chamber {SAPHIR}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {8},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-59609},
      pages        = {2189 - 2200},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The atmosphere simulation chamber SAPHIR at the Research
                      Centre Julich was used to test the suitability of
                      state-of-the-art analytical instruments for the measurement
                      of gas-phase formaldehyde (HCHO) in air. Five analyzers
                      based on four different sensing principles were deployed: a
                      differential optical absorption spectrometer (DOAS),
                      cartridges for $2,4-dinitro\-phenyl\-hydrazine$ (DNPH)
                      derivatization followed by off-line high pressure liquid
                      chromatography (HPLC) analysis, two different types of
                      commercially available wet chemical sensors based on
                      Hantzsch fluorimetry, and a proton-transfer-reaction mass
                      spectrometer (PTR-MS). A new optimized mode of operation was
                      used for the PTR-MS instrument which significantly enhanced
                      its performance for online HCHO detection at low absolute
                      humidities.The instruments were challenged with typical
                      ambient levels of HCHO ranging from zero to several ppb.
                      Synthetic air of high purity and particulate-filtered
                      ambient air were used as sample matrices in the atmosphere
                      simulation chamber onto which HCHO was spiked under varying
                      levels of humidity and ozone. Measurements were compared to
                      mixing ratios calculated from the chamber volume and the
                      known amount of HCHO injected into the chamber; measurements
                      were also compared between the different instruments. The
                      formal and blind intercomparison exercise was conducted
                      under the control of an independent referee. A number of
                      analytical problems associated with the experimental set-up
                      and with individual instruments were identified, the overall
                      agreement between the methods was fair.},
      keywords     = {J (WoSType)},
      cin          = {ICG-2},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB791},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000255511300003},
      doi          = {10.5194/acp-8-2189-2008},
      url          = {https://juser.fz-juelich.de/record/59609},
}