Preprints
https://doi.org/10.5194/amt-2021-291
https://doi.org/10.5194/amt-2021-291

  22 Nov 2021

22 Nov 2021

Review status: this preprint is currently under review for the journal AMT.

Comparison of nitrous acid detection using open-path incoherent broadband cavity-enhanced absorption spectroscopy and extractive long-path absorption photometry

Sophie Dixneuf1,a, Albert A. Ruth1, Rolf Häseler2,, Theo Brauers2,, Franz Rohrer2, and Hans-Peter Dorn2 Sophie Dixneuf et al.
  • 1Department of Physics & Environmental Research Institute, University College Cork, Cork, Ireland
  • 2Institut für Energie und Klimaforschung, IEK-8: Troposphäre, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
  • acurrent address: Bioaster Technology Research Institute - Bioassays, Microsystems & Optics Engineering Unit, 40 Avenue Tony Garnier, 69007 Lyon, France
  • deceased, Rolf Häseler on 25 July 2017 and Theodor Brauers on 21 February 2014

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 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 has also been detected at mixing ratios below 5 ppbv. 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.

Sophie Dixneuf et al.

Status: open (until 27 Dec 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Sophie Dixneuf et al.

Sophie Dixneuf et al.

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Short summary
Atmospheric chambers, like the one at Forschungszentrum Jülich, are used to experimentally simulate specific atmospheric scenarios to improve our understanding of the complex chemical reactions occurring in our atmospheres. These facilities hence require cutting edge gas sensing capabilities to detect trace gases at the lowest level and in a short time. One important trace gas is HONO for which we custom-built an optical sensing setup, capable of detecting 1 HONO molecule in 40 billion in 1 min.