Implementation of an incoherent broadband cavity-enhanced absorption spectroscopy technique in an atmospheric simulation chamber for in situ NO<sub>3</sub> monitoring: characterization and validation for kinetic studies
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Published:2020-11-25
Issue:11
Volume:13
Page:6311-6323
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ISSN:1867-8548
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Container-title:Atmospheric Measurement Techniques
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language:en
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Short-container-title:Atmos. Meas. Tech.
Author:
Fouqueau Axel, Cirtog Manuela, Cazaunau Mathieu, Pangui Edouard, Zapf Pascal, Siour Guillaume, Landsheere Xavier, Méjean GuillaumeORCID, Romanini Daniele, Picquet-Varrault BénédicteORCID
Abstract
Abstract. An incoherent broadband cavity-enhanced absorption
spectroscopy (IBBCEAS) technique has been developed for the in situ monitoring
of NO3 radicals at the parts per trillion level in the CSA simulation chamber (at
LISA). The technique couples an incoherent broadband light source centered
at 662 nm with a high-finesse optical cavity made of two highly reflecting
mirrors. The optical cavity which has an effective length of 82 cm allows
for up to 3 km of effective absorption and a high sensitivity for NO3
detection (up to 6 ppt for an integration time of 10 s). This
technique also allows for NO2 monitoring (up to 9 ppb for an integration
time of 10 s). Here, we present the experimental setup as well as
tests for its characterization and validation. The validation tests include
an intercomparison with another independent technique (Fourier-transform infrared, FTIR) and the
absolute rate determination for the reaction trans-2-butene + NO3, which is
already well documented in the literature. The value of (4.13 ± 0.45) × 10−13 cm3 molecule−1 s−1 has been found,
which is in good agreement with previous determinations. From these
experiments, optimal operation conditions are proposed. The technique is now
fully operational and can be used to determine rate constants for fast
reactions involving complex volatile organic compounds (VOCs; with rate constants
up to 10−10 cm3 molecule−1 s−1).
Funder
Seventh Framework Programme Horizon 2020
Publisher
Copernicus GmbH
Subject
Atmospheric Science
Reference47 articles.
1. Atkinson, R.: Atmospheric chemistry of VOCs and NOx, Atmos. Environ., 34,
2063–2101, 2000. 2. Atkinson, R., Plum, C. N., Carter, W. P. L., Winer, A. M., and Pitts, J. N.:
Rate constants for the gas-phase reactions of nitrate radicals with a series
of organics in air at 298 ± 1 K, J. Phys. Chem., 88, 1210–1215, https://doi.org/10.1021/j150650a039, 1984. 3. Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., and Troe, J.: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume I – gas phase reactions of Ox, HOx, NOx and SOx species, Atmos. Chem. Phys., 4, 1461–1738, https://doi.org/10.5194/acp-4-1461-2004, 2004. 4. Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., Troe, J., and IUPAC Subcommittee: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume II – gas phase reactions of organic species, Atmos. Chem. Phys., 6, 3625–4055, https://doi.org/10.5194/acp-6-3625-2006, 2006. 5. Ball, S. M., Langridge, J. M., and Jones, R. L.: Broadband Cavity Enhanced
Absorption Spectroscopy using Light Emitting Diodes, Chem. Phys. Lett., 398,
68–74, https://doi.org/10.1016/j.cplett.2004.08.144, 2004.
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