Establishment and Study of the Gas Phase Calibration Source of Hydroxyl Radical

REN Xinrong£¬ TANG Mingyu£¬ SHAO Kesheng£¬ WANG Huixiang£¬ TANG Xiaoyan

(The State Key Laboratory of Environmental Simulation and Pollution Control,
Center of Environmental Sciences, Peking University,Beijing,100871)


Abstract:
The gas phase calibration source of hydroxyl radical was established using photolysis of H2O at 184.9 nm UV-light produced by low-pressure Hg lamp.The concentration of OH was inferred from the concentrations of O3 and H2O in the flow.The OH concentration was also measured using salicylic acid liquid phase scrubbing and high performance liquid chromatography (HPLC) technique.The relationship between the calculated and measured OH concentrations was relatively uniform.The surface effect in the photolysis tube was studied using laser-induced fluorescence signal and was not of importance.

Key words:
hydroxyl radical; calibration source; liquid phase scrubbing; atmospheric chemistry

£¨R.D.2000-01-07 P.D.2000-11-20 Vol.36 No.6 pp.772¡ª776£©



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