| 大气OH自由基浓度的测定 |
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| 引用本文： | 任信荣,邵可声,缪国芳,唐孝炎.大气OH自由基浓度的测定[J].中国环境科学,2001,21(2):0-0. |
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| 作者姓名： | 任信荣 邵可声 缪国芳 唐孝炎 |
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| 作者单位： | 北京大学环境科学中心, |
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| 基金项目： | 国家自然科学基金资助项目(29837190) |
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| 摘 要： | 利用水杨酸浸渍膜捕集大气OH自由基，生成的主要荧产物2,5-二羟基苯甲酸由高效液相色谱法分离测定，推算得到大气OH自由基浓度，根据此原理建立了大气OH自由基测量方法，对北京市夏季晴朗条件下大气OH自由基浓度进行了测定，得到其浓度范围为0.4×107～5.5×107个/cm3,最大值为5.5×107个/cm3，并讨论了污染大气中较高OH自由基浓度产生的原因.
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| 关 键 词： | 大气OH自由基 浸渍膜捕集 高效液相色谱 测量 |
| 文章编号： | 1000-6923(2001)02-0115-04 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 2000年8月30日 |
Determination of hydroxyl
radical concentration in atmosphere. |
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| REN Xin-rong,SHAO Ke-sheng,MIAO Guo-fang,TANG Xiao-yan.Determination of hydroxyl
radical concentration in atmosphere.[J].China Environmental Science,2001,21(2):0-0. |
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| Authors: | REN Xin-rong SHAO Ke-sheng MIAO Guo-fang TANG Xiao-yan |
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| Institution: | REN Xin-rong,SHAO Ke-sheng,MIAO Guo-fang,TANG Xiao-yan -State Key Joint Laboratory of Environmental Simulation and Pollution Control,Center of Environmental Sciences,peking University,Beijing 100871,China-. |
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| Abstract: | The measurement of atmospheric hydroxyl radical (OH) was carried out by salicylic acid impregnated filter trapping; the main fluorescent product 2,5-dihydroxybenzoic acid was separated and determined by high performance liquid chromatography (HPLC), and the concentration of atmospheric hydroxyl radical was calculated. Based on this principle, a method was set up to determine the atmospheric hydroxyl radical; and its concentration was determined under sunny day condition of summer in Beijing. The results showed that the concentration ranged from 0.4′107 OH/cm3 to 5.5′107 OH/cm3 and the maximum concentration was 5′107 OH/cm3. The reasons of relatively high OH concentrations in the polluted atmosphere were discussed. |
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