| OH自由基绝对标定系统的建立和研究 |
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| 引用本文： | 任信荣,Matthias Otting,邵可声,唐孝炎.OH自由基绝对标定系统的建立和研究[J].环境科学学报,2000,20(6):688-692. |
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| 作者姓名： | 任信荣 Matthias Otting 邵可声 唐孝炎 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金!资助项目 (批准号 :2 95772 68) |
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| 摘 要： | 利用H2 O在 1 85nm紫外光照射下产生定量OH自由基 ,用低压扩散激光诱导荧光技术建立了OH自由基标定系统 .在实验条件下 ,体系产生OH自由基的浓度范围为 3× 1 0 7— 2× 1 0 9个·cm- 3,得到归一化荧光信号 (S)与OH自由基浓度的定量关系为S =6 0 4× 1 0 - 9OH]- 0 0 4 0 7(R2 =0 987) ,并研究和讨论了饱和效应以及体系中可能存在的干扰 .
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| 关 键 词： | OH自由基 大气化学 标定系统 大气监测 |
| 收稿时间： | 1999/11/25 0:00:00 |
| 修稿时间： | 1999-11-25 |
Establishment and study of the absolute calibration system of hydroxyl radical detection |
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| REN Xinrong,Matthias Otting,SHAO Kesheng and TANG Xiaoyan.Establishment and study of the absolute calibration system of hydroxyl radical detection[J].Acta Scientiae Circumstantiae,2000,20(6):688-692. |
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| Authors: | REN Xinrong Matthias Otting SHAO Kesheng and TANG Xiaoyan |
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| Institution: | Center of Environmental Sciences, The National Key Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871,Center of Environmental Sciences, The National Key Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871,Center of Environmental Sciences, The National Key Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871 and Center of Environmental Sciences, The National Key Laboratory of Environmental Simulation and Pollution Control, Peking University, Beijing 100871 |
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| Abstract: | The absolute calibration system of OH radical has been established under the laboratory conditions using fluorescence assay by gas expansion (FAGE) technique.It is based on the photolysis of H2O radiated by 185nm UV light produced by low-pressure Hg lamp.The relationship between the normalized fluorescence signal ( S ) and the OH concentration (OH]) is: S =6.04×10-9 -0.0407( R2=0.987).And the detection limitation was about 4.7×107 OH·cm-3.The possible interferences and saturation effect were discussed. |
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| Keywords: | hydroxyl radical calibration laser\|induced fluorescence atmospheric chemistry |
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