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首页> 外文期刊>Environmental Science & Technology >Nitrogen-Containing Low Volatile Compounds from Pinonaldehyde-Dimethylamine Reaction in the Atmosphere: A Laboratory and Field Study
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Nitrogen-Containing Low Volatile Compounds from Pinonaldehyde-Dimethylamine Reaction in the Atmosphere: A Laboratory and Field Study

机译:大气中品醛-二甲胺反应中含氮低挥发性化合物的实验室和田间研究

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摘要

Pinonaldehyde, which is among the most abundant oxidation products of α-pinene, and dimethylamine were selected to study the formation of N-containing low volatile compounds from aldehyde-amine reactions in the atmosphere. Gas phase reactions took place in a Tedlar bag, which was connected to a mass spectrometer ionization source via a short deactivated fused silica column. In addition to on-line analysis, abundance of gaseous precursors and reaction products were monitored offline. Condensable products were extracted from the bag's walls with a suitable solvent and analyzed by gas chromatography coupled to chemical ionization high-resolution quadrupole time-of-flight mass spectrometry and by ultra-high-performance liquid chromatography coupled to electrospray ionization Orbitrap mass spectrometry. The reactions carried out resulted in several mid-low vapor pressure nitrogen-containing compounds that are potentially important for the formation of secondary organic aerosols in the atmosphere. Further, the presence of brown carbon, confirmed byUiquid chromatography-UV-vis-mass spectrometry, was observed. Some of the compounds identified in the laboratory study were also observed in aerosol samples collected at SMEAR Ⅱ station (Hyytiaelae, Finland) in August 2015 suggesting the importance of aldehyde-amine reactions for the aerosol formation and growth.
机译:选择了α-pine烯最丰富的氧化产物之一的品松醛和二甲胺,以研究大气中醛胺反应形成的含氮低挥发性化合物。气相反应在Tedlar袋中进行,该袋通过短钝化的熔融硅胶柱连接到质谱仪的电离源。除了在线分析之外,还离线监测了气态前体和反应产物的含量。用合适的溶剂从袋子的壁中提取出可冷凝的产品,并通过气相色谱与化学电离高分辨率四极杆飞行时间质谱联用,以及超高效液相色谱与电喷雾电离Orbitrap质谱联用进行分析。进行的反应产生了几种中低蒸气压的含氮化合物,这些化合物对于在大气中形成二次有机气溶胶具有潜在的重要性。此外,观察到褐色碳的存在,通过Uiquid色谱法-UV-vis-质谱法确认。 2015年8月在SMEARⅡ站(Hyytiaelae,芬兰)收集的气溶胶样品中还观察到了实验室研究中鉴定出的一些化合物,这表明醛胺反应对于气溶胶形成和生长很重要。

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  • 来源
    《Environmental Science & Technology》 |2016年第9期|4693-4700|共8页
  • 作者单位

    Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland;

    Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland;

    Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland;

    Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland;

    Division of Atmospheric Sciences, Department of Physics, University of Helsinki, P.O. Box 64, 00014 Helsinki, Finland;

    Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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