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Development of a net ozone production rate detection system based on dual-channel cavity ring-down spectroscopy.
Tong, Jinzhao; Hu, Renzhi; Hu, Changjin; Liu, Xiaoyan; Cai, Haotian; Lin, Chuan; Zhong, Liujun; Wang, Jiawei; Xie, Pinhua.
Afiliación
  • Tong J; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Hu R; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China. Electronic address: rzhu@aiofm.ac.cn.
  • Hu C; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Liu X; School of Pharmacy, Anhui Medical University, Hefei 230032, China.
  • Cai H; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Lin C; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Zhong L; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Wang J; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.
  • Xie P; School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China; Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China. Electronic address: phxie@aiofm.ac.
J Environ Sci (China) ; 149: 419-430, 2025 Mar.
Article en En | MEDLINE | ID: mdl-39181654
ABSTRACT
A novel system for measuring net photochemical ozone production rates in the atmosphere based on cavity ring-down spectroscopy (OPR-CRDS) was developed. The system consists of two chambers (a reaction chamber and a reference chamber) and a dual-channel Ox-CRDS detector. To minimize the wall loss of Ox in the chambers, the inner surfaces of both chambers are coated with Teflon film. The performance of the OPR-CRDS system was characterized. It was found that even though the photolysis frequency (J value) decreased by 10%, the decrease in the P(O3) caused by the ultraviolet-blocking film coating was less than 3%. The two chambers had a good consistency in the mean residence time and the measurement of NO2 and Ox under the condition of no sunlight. The detection limit of the OPR-CRDS was determined to be 0.20 ppbv/hr. To further verify the accuracy of the system, the direct measurement values of the OPR-CRDS system were compared with the calculation results based on radical (OH, HO2, and RO2) reactions, and a good correlation was obtained between the measured and calculated values. Finally, the developed instrument was applied to obtain the comprehensive field observations at an urban site in the Yangtze River Delta (China) for 40 days, the time series and change characteristics of the P(O3) were obtained directly, and the good environmental adaptability and stability of the OPR-CRDS system were demonstrated. It is expected that the new instrument will be beneficial to investigations of the relationship between P(O3) and its precursors.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Monitoreo del Ambiente / Contaminantes Atmosféricos País/Región como asunto: Asia Idioma: En Revista: J Environ Sci (China) Asunto de la revista: SAUDE AMBIENTAL Año: 2025 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ozono / Monitoreo del Ambiente / Contaminantes Atmosféricos País/Región como asunto: Asia Idioma: En Revista: J Environ Sci (China) Asunto de la revista: SAUDE AMBIENTAL Año: 2025 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos