气相OH标准发生源的建立和研究

北京大学学报（自然科学版）

气相OH标准发生源的建立和研究

任信荣,唐明宇,邵可声,王会祥,唐孝炎

北京大学环境科学中心，环境模拟与污染控制国家重点联合实验室，北京，100871

收稿日期:2000-01-07 出版日期:2000-11-20 发布日期:2000-11-20

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

Received:2000-01-07 Online:2000-11-20 Published:2000-11-20

摘要/Abstract

摘要： 利用H₂O在184.9 nm紫外光照射下光解产生OH自由基建立了气相OH标准发生源，通过测量气流中O₃和H₂O浓度计算得到OH浓度，此计算浓度与利用水杨酸液相吸收-高效液相色谱法测得的OH浓度比较一致，同时用激光诱导荧光技术对可能存在的壁效应进行研究，结果表明在较高流速下其影响较小。

关键词: 氢氧自由基, 标准源, 液相吸收, 大气化学

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

中图分类号:

X132

任信荣,唐明宇,邵可声,王会祥,唐孝炎. 气相OH标准发生源的建立和研究[J]. 北京大学学报（自然科学版）.

REN Xinrong,TANG Mingyu,SHAO Kesheng,WANG Huixiang,TANG Xiaoyan. Establishment and Study of the Gas Phase Calibration Source of Hydroxyl Radical[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y2000/V36/I6/772

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