Preprint FZJ-2021-05436

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

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2021
Copernicus Katlenburg-Lindau

Atmospheric measurement techniques discussions () [10.5194/amt-2021-291]

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Abstract: 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.

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Contributing Institute(s):
  1. Troposphäre (IEK-8)
Research Program(s):
  1. 2111 - Air Quality (POF4-211) (POF4-211)

Appears in the scientific report 2021
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Creative Commons Attribution CC BY 4.0 ; OpenAccess ; Ebsco Academic Search
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