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@ARTICLE{Dixneuf:909369,
      author       = {Dixneuf, Sophie and Ruth, Albert A. and Häseler, Rolf and
                      Brauers, Theo and Rohrer, Franz and Dorn, Hans-Peter},
      title        = {{D}etection of nitrous acid in the atmospheric simulation
                      chamber {SAPHIR} using open-path incoherent broadband
                      cavity-enhanced absorption spectroscopy and extractive
                      long-path absorption photometry},
      journal      = {Atmospheric measurement techniques},
      volume       = {15},
      number       = {4},
      issn         = {1867-1381},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2022-03157},
      pages        = {945 - 964},
      year         = {2022},
      abstract     = {An instrument based on 20 m open-path incoherent
                      broadband cavity-enhanced absorption spectroscopy (IBBCEAS)
                      was established at the Jülich SAPHIR chamber in spring
                      2011. The setup was optimized for the detection of HONO and
                      NO2 in the near-UV region 352–386 nm, utilizing a bright
                      hot-spot Xe-arc lamp and a UV-enhanced charge-coupled device
                      (CCD) detector. A 2σ detection limit of 26 pptv for HONO
                      and 76 pptv for NO2 was achieved for an integration time
                      of 1 min. Methacrolein (MACR) was also detected at mixing
                      ratios below 5 ppbv with an estimated 2σ detection limit
                      of 340 pptv for the same integration time. The IBBCEAS
                      instrument's performance for HONO and NO2 detection was
                      compared to that of extractive wet techniques, long-path
                      absorption photometry (LOPAP), and chemiluminescence
                      spectrometry (CLS) NOx detection, respectively. For the
                      combined data sets an overall good agreement for both trend
                      and absolute mixing ratios was observed between IBBCEAS and
                      these established instruments at SAPHIR. Correlation
                      coefficients r for HONO range from 0.930 to 0.994 and for
                      NO2 from 0.937 to 0.992. For the single measurement of MACR
                      r=0.981 is found in comparison to proton-transfer-reaction
                      mass spectrometry (PTRMS).},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {2111 - Air Quality (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2111},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000762545700001},
      doi          = {10.5194/amt-15-945-2022},
      url          = {https://juser.fz-juelich.de/record/909369},
}