| DOI: | 10.1016/j.atmosenv.2014.06.027
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| Scopus记录号: | 2-s2.0-84902659438
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| 论文题名: | Acetyl radical generation in cigarette smoke: Quantification and simulations |
| 作者: | Hu N; , Green S; A
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| 刊名: | Atmospheric Environment
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| ISSN: | 0168-2563
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| EISSN: | 1573-515X
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| 出版年: | 2014
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| 卷: | 95 | | 起始页码: | 142
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| 结束页码: | 150
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| 语种: | 英语
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| 英文关键词: | Acetyl radical
; Free radicals
; Isoprene
; Kinetic simulation
; Reactive oxygen species
; Tobacco smoke
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| Scopus关键词: | Chromatography
; Computer simulation
; Free radicals
; Gases
; High performance liquid chromatography
; Isoprene
; Mass spectrometry
; Tobacco
; Acetyl radical
; Formation mechanism
; Kinetic simulation
; Liquid chromatography-Mass spectrometry
; Master chemical mechanism
; Reactive oxygen species
; Second hand smokes
; Tobacco smoke
; Smoke
; acetaldehyde
; acetic acid derivative
; cigarette smoke
; free radical
; hydrogen
; hydroxyl radical
; isoprene
; aerosol
; flow pattern
; free radical
; reaction kinetics
; simulation
; smoke
; article
; calibration
; chemical analysis
; chemical structure
; collisionally activated dissociation
; computer simulation
; controlled study
; derivatization
; distillation
; electrospray mass spectrometry
; gas
; high performance liquid chromatography
; ion monitoring
; irradiation
; particulate matter
; passive smoking
; priority journal
; quantitative analysis
; smoking
; tandem mass spectrometry
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| Scopus学科分类: | Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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| 英文摘要: | Free radicals are present in cigarette smoke and can have a negative effect on human health. However, little is known about their formation mechanisms. Acetyl radicals were quantified in tobacco smoke and mechanisms for their generation were investigated by computer simulations. Acetyl radicals were trapped from the gas phase using 3-amino-2, 2, 5, 5-tetramethyl-proxyl (3AP) on solid support to form stable 3AP adducts for later analysis by high-performance liquid chromatography (HPLC), mass spectrometry/tandem mass spectrometry (MS-MS/MS) and liquid chromatography-mass spectrometry (LC-MS). Simulations were performed using the Master Chemical Mechanism (MCM). A range of 10-150nmol/cigarette of acetyl radical was measured from gas phase tobacco smoke of both commercial and research cigarettes under several different smoking conditions. More radicals were detected from the puff smoking method compared to continuous flow sampling. Approximately twice as many acetyl radicals were trapped when a glass fiber particle filter (GF/F specifications) was placed before the trapping zone. Simulations showed that NO/NO2 reacts with isoprene, initiating chain reactions to produce hydroxyl radical, which abstracts hydrogen from acetaldehyde to generate acetyl radical. These mechanisms can account for the full amount of acetyl radical detected experimentally from cigarette smoke. Similar mechanisms may generate radicals in second hand smoke. © 2014 Elsevier Ltd. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/80897
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, United States
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| Recommended Citation: | |
Hu N,, Green S,A. Acetyl radical generation in cigarette smoke: Quantification and simulations[J]. Atmospheric Environment,2014-01-01,95
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