Articles | Volume 20, issue 21
https://doi.org/10.5194/acp-20-13417-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-13417-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Technical note
| 
12 Nov 2020
Technical note |
| 12 Nov 2020
| 12 Nov 2020
Technical Note: Effect of varying the λ = 185 and 254 nm photon flux ratio on radical generation in oxidation flow reactors
Jake P. Rowe
Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USA
now at: Department of Chemistry, University of Colorado, Boulder, CO, USA
Center for Aerosol and Cloud Chemistry, Aerodyne Research Inc., Billerica, MA, USA
William H. Brune
Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, USA
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22 citations as recorded by crossref.
- Secondary Organic Aerosol Formation from Ambient Air in Summer in Urban Beijing: Contribution of S/IVOCs and Impacts of Heat Waves Z. Zhang et al. 10.1021/acs.estlett.4c00415
- Quantification of isomer-resolved iodide chemical ionization mass spectrometry sensitivity and uncertainty using a voltage-scanning approach C. Bi et al. 10.5194/amt-14-6835-2021
- Kinetics and Products of Heterogeneous Hydroxyl Radical Oxidation of Isoprene Epoxydiol-Derived Secondary Organic Aerosol J. Yan et al. 10.1021/acsearthspacechem.3c00073
- Low-temperature ice nucleation of sea spray and secondary marine aerosols under cirrus cloud conditions R. Patnaude et al. 10.5194/acp-24-911-2024
- Advances in the Separation and Detection of Secondary Organic Aerosol Produced by Decamethylcyclopentasiloxane (D5) in Laboratory-Generated and Ambient Aerosol J. Meepage et al. 10.1021/acsestair.3c00073
- Photo-persulfate oxidation and mineralization of benzoic acid: Kinetics and optimization under UVC irradiation V. Sugihartono et al. 10.1016/j.chemosphere.2022.133663
- Impact of Molecular Structure on Secondary Organic Aerosol Formation from Aliphatic Carbonyls C. Liang et al. 10.1021/acs.est.5c00793
- Comparison of the Yield and Chemical Composition of Secondary Organic Aerosol Generated from the OH and Cl Oxidation of Decamethylcyclopentasiloxane A. Avery et al. 10.1021/acsearthspacechem.2c00304
- Roadside air pollution and secondary organic aerosol seasonal trends from an oxidation flow reactor in Seoul G. Park et al. 10.1016/j.atmosenv.2023.120051
- A comprehensive evaluation of enhanced temperature influence on gas and aerosol chemistry in the lamp-enclosed oxidation flow reactor (OFR) system T. Pan et al. 10.5194/amt-17-4915-2024
- Secondary organic aerosol formation and aging from ambient air in an oxidation flow reactor during wintertime in Beijing, China W. Xu et al. 10.1016/j.envres.2022.112751
- A comprehensive characterization of empirical parameterizations for OH exposure in the Aerodyne Potential Aerosol Mass Oxidation Flow Reactor (PAM-OFR) Q. Liu et al. 10.5194/amt-18-2509-2025
- Chemical Composition of Fresh and Aged Asphalt-Related Organic Aerosols: From Ambient Observations to Laboratory Experiments P. Khare et al. 10.1021/acsestair.4c00193
- Seasonal chemical characteristics and formation of potential secondary aerosols of a remote area in South Korea using an oxidation flow reactor S. Kang et al. 10.1016/j.atmosenv.2025.121216
- Dependence of Reactive Oxygen Species Formation on the Oxidation State of Biogenic Secondary Organic Aerosols K. Edwards et al. 10.1021/acsestair.5c00133
- Insights Into Formation and Aging of Secondary Organic Aerosol From Oxidation Flow Reactors: A Review Z. Zhang et al. 10.1007/s40726-024-00309-7
- Chemical characterization and formation of secondary organosiloxane aerosol (SOSiA) from OH oxidation of decamethylcyclopentasiloxane Y. Chen et al. 10.1039/D2EA00161F
- Enhanced sulfate formation in mixed biomass burning and sea-salt interactions mediated by photosensitization: effects of chloride, nitrogen-containing compounds, and atmospheric aging R. Tang et al. 10.5194/acp-25-425-2025
- Comparison of secondary organic aerosol generated from the oxidation of laboratory precursors by hydroxyl radicals, chlorine atoms, and bromine atoms in an oxidation flow reactor A. Lambe et al. 10.1039/D2EA00018K
- Is the Reaction Rate Coefficient for OH + HO2 → H2O + O2 Dependent on Water Vapor? W. Brune & J. Jenkins 10.1021/jacsau.4c00905
- Aerosol chemistry of oxygenated terpenes in simple and complex chemical systems F. Khalaj et al. 10.1080/02786826.2024.2427283
- Diel cycle impacts on the chemical and light absorption properties of organic carbon aerosol from wildfires in the western United States B. Sumlin et al. 10.5194/acp-21-11843-2021
Latest update: 29 Jul 2025
Short summary
We conducted a series of experiments in which the 185 to 254 nm photon flux ratio (I185 : I254) emitted by low-pressure mercury lamps installed in an oxidation flow reactor (OFR) was systematically varied using multiple novel lamp configurations. Integrated OH exposure values achieved for each lamp type were obtained as a function of OFR operating conditions. A photochemical box model was used to develop a generalized OH exposure estimation equation as a function of [H2O], [O3], and OH reactivity.
We conducted a series of experiments in which the 185 to 254 nm photon flux ratio (I185 : I254)...
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