| Determination of Henry's Law constant for methyl hydroperoxide by long path FTIR |
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| 作者姓名： | LI Shuang CHEN Zhongming SHI Fei |
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| 作者单位： | The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China,The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China,The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (Grant No. 20107001), the Project of Development Plan of the State Key Fundamental Research (Grant No. 2002CB410802) and the Excellent Young Teachers Program of MOE, China |
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| 摘 要： | Methyl hydroperoxide (MHP, CH3OOH) is one of the main organic peroxides in the atmosphere. In order to understand how MHP partitions in atmospheric gas and liquid phases, the Henry's Law constant for its aqueous solution is determined. A novel technique is established for measuring gas-phase MHP concentration, I.e. The gas phase is collected by a gas-bag and then analyzed by long path Fourier transform infrared (LP-FTIR) spectrometry. At 283 K～303 K, the temperature dependence of the Henry's Law constant for MHP can be expressed as lnKH= a/T - b, a = 4386 ± 140, b = 9.19 ± 0.48, where KH is in unit of molar concentration per atm,and T is in degrees Kelvin. The standard heat of solution is 36.45 ± 1.16 kJ? K- 1? mol-1.
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| 关 键 词： | Henry's Law constant methyl hydroperoxide atmosphere FTIR |
Determination of Henry's Law constant for methyl hydroperoxide by long path FTIR |
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| LI Shuang,CHEN Zhongming,SHI Fei.Determination of Henry''s Law constant for methyl hydroperoxide by long path FTIR[J].Progress in Natural Science,2004,14(9):765-769. |
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| Authors: | LI Shuang CHEN Zhongming SHI Fei |
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| Institution: | The State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, China |
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| Abstract: | Methyl hydroperoxide (MHP, CH3OOH) is one of the main organic peroxides in the atmosphere. In order to understand how MHP partitions in atmospheric gas and liquid phases, the Henry's Law constant for its aqueous solution is determined. A novel technique is established for measuring gas-phase MHP concentration, I.e. The gas phase is collected by a gas-bag and then analyzed by long path Fourier transform infrared (LP-FTIR) spectrometry. At 283 K～303 K, the temperature dependence of the Henry's Law constant for MHP can be expressed as lnKH= a/T - b, a = 4386 ± 140, b = 9.19 ± 0.48, where KH is in unit of molar concentration per atm,and T is in degrees Kelvin. The standard heat of solution is 36.45 ± 1.16 kJ· K- 1· mol-1. |
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| Keywords: | Henry's Law constant methyl hydroperoxide atmosphere FTIR |
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