Articles | Volume 14, issue 3
Atmos. Meas. Tech., 14, 1851–1877, 2021
https://doi.org/10.5194/amt-14-1851-2021
Atmos. Meas. Tech., 14, 1851–1877, 2021
https://doi.org/10.5194/amt-14-1851-2021

Research article 05 Mar 2021

Research article | 05 Mar 2021

Characterization of a chemical modulation reactor (CMR) for the measurement of atmospheric concentrations of hydroxyl radicals with a laser-induced fluorescence instrument

Changmin Cho et al.

Data sets

Characterization and application of a chemical modulation reactor during the JULIAC campaign, V1 C. Cho, A. Hofzumahaus, H. Fuchs, H.-P. Dorn, M. Glowania, F. Holland, F. Rohrer, V. Vardhan, A. Kiendler-Scharr, A. Wahner, and A. Novelli https://doi.org/10.26165/JUELICHDATA/GK7PJQ

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Short summary
This study describes the implementation and characterization of the chemical modulation reactor (CMR) used in the laser-induced fluorescence instrument of the Forschungszentrum Jülich. The CMR allows for interference-free OH radical measurement in ambient air. During a field campaign in a rural environment, the observed interference was mostly below the detection limit of the instrument and fully explained by the known ozone interference.