Citation: Li Shule, Lu Keding, Ma Xuefei, Yang Xinping, Chen Shiyi, Zhang Yuanhang. Field measurement of the organic peroxy radicals by the low-pressure reactor plus laser-induced fluorescence spectroscopy[J]. Chinese Chemical Letters, ;2020, 31(10): 2799-2802. doi: 10.1016/j.cclet.2020.07.051 shu

Field measurement of the organic peroxy radicals by the low-pressure reactor plus laser-induced fluorescence spectroscopy

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China

k.lu@pku.edu.cn

Received Date: 15 June 2020
Revised Date: 7 July 2020
Accepted Date: 29 July 2020
Available Online: 31 July 2020

Figures(4)

A low-pressure reactor (LPR) was developed for the measurement of ambient organic peroxy (RO₂) radicals with the use of the laser-induced fluorescence (LIF) instrument. The reactor converts all the RO_x (=RO₂ + HO₂ + RO + OH) radicals into HO₂ radicals. It can conduct different measurement modes through altering the reagent gases, achieving the speciated measurement of RO₂ and RO₂^# (RO₂ radicals derived from the long-chain alkane, alkene and aromatic hydrocarbon). An example of field measurement results was given, with a maximum concentration of 1.88×10⁸ molecule/cm³ for RO₂ and 1.18×10⁸ molecule/cm³ for RO₂^#. Also, this instrument quantifies the local ozone production rates directly, which can help to deduce the regional ozone control strategy from an experimental perspective. The new device can serve as a potent tool for both the exploration of frontier chemistry and the diagnosis of the control strategies.
- Organic peroxy radicals,
- Flow tube reactor,
- LIF,
- RO₂ measurement,
- Field observation,
- Ozone production rate
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