Articles | Volume 10, issue 12
Atmos. Meas. Tech., 10, 4877–4894, 2017
https://doi.org/10.5194/amt-10-4877-2017
Atmos. Meas. Tech., 10, 4877–4894, 2017
https://doi.org/10.5194/amt-10-4877-2017

Research article 14 Dec 2017

Research article | 14 Dec 2017

An intercomparison of HO2 measurements by fluorescence assay by gas expansion and cavity ring-down spectroscopy within HIRAC (Highly Instrumented Reactor for Atmospheric Chemistry)

Lavinia Onel et al.

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Cited articles

Assaf, E., Asvany, O., Votava, O., Batut, S., Schoemaecker, C., and Fittschen, C.: Measurement of line strengths in the Ã2A' ← X̃ ∼ 2 A transition of HO2 and DO2, J. Quant. Spectrosc. Ra., 201, 161–170, https://doi.org/10.1016/j.jqsrt.2017.07.004, 2017.
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Bell, C. L., van Helden, J. P. H., Blaikie, T. P. J., Hancock, G., van Leeuwen, N. J., Peverall, R., and Ritchie, G. A. D.: Noise-Immune Cavity-Enhanced Optical Heterodyne Detection of HO2 in the Near-Infrared Range, J. Phys. Chem. A, 116, 5090–5099, https://doi.org/10.1021/jp301038r, 2012.
Blin-Simiand, N., Pasquiers, S., and Magne, L.: Removal of formaldehyde by a pulsed dielectric barrier discharge in dry air in the 20 °C to 300 °C temperature range, J. Phys. D. Appl. Phys, 49, 195202, https://doi.org/10.1088/0022-3727/49/19/195202, 2016.
Blocquet, M., Schoemaecker, C., Amedro, D., Herbinet, O., Battin-Leclerc, F., and Fittschen, C.: Quantification of OH and HO2 radicals during the low-temperature oxidation of hydrocarbons by Fluorescence Assay by Gas Expansion technique, P. Natl. Acad. Sci. USA, 110, 20014–20017, https://doi.org/10.1073/pnas.1314968110, 2013.
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Short summary
Hydroperoxy (HO2) radicals are key intermediates participating in a rapid chemical cycling at the centre of the tropospheric oxidation. Fluorescence assay by gas expansion (FAGE) technique is the most commonly used for the HO2 measurements in the atmosphere. However, FAGE is an indirect technique, requiring calibration. This work finds a good agreement between the indirect FAGE method and the direct cavity ring-down spectroscopy method and hence validates FAGE and the FAGE calibration method.