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首页> 外文期刊>International Journal of Environmental Research and Public Health >Measurement of Secondary Products During Oxidation Reactions of Terpenes and Ozone Based on the PTR-MS Analysis: Effects of Coexistent Carbonyl Compounds
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Measurement of Secondary Products During Oxidation Reactions of Terpenes and Ozone Based on the PTR-MS Analysis: Effects of Coexistent Carbonyl Compounds

机译：基于PTR-MS分析的萜烯与臭氧氧化反应过程中副产物的测定：共存羰基化合物的影响

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Continuous measurements using proton transfer reaction mass spectrometry (PTR-MS) can be used to describe the production processes of secondary products during ozone induced oxidation of terpenes. Terpenes are emitted from woody building materials, and ozone is generated from ozone air purifiers and copy machines in indoor environments. Carbonyl compounds (CCs) are emitted by human activities such as smoking and drinking alcohol. Moreover, CCs are generated during ozone oxidation of terpenes. Therefore, coexistent CCs should affect the ozone oxidation. This study has focused on the measurement of secondary products during the ozone oxidation of terpenes based on the use of PTR-MS analysis and effects of coexistent CCs on oxidized products. Experiments were performed in a fluoroplastic bag containing α-pinene or limonene as terpenes, ozone and acetaldehyde or formaldehyde as coexistent CCs adjusted to predetermined concentrations. Continuous measurements by PTR-MS were conducted after mixing of terpenes, ozone and CCs, and time changes of volatile organic compounds (VOCs) concentrations were monitored. Results showed that, high-molecular weight intermediates disappeared gradually with elapsed time, though the production of high-molecular weight intermediates was observed at the beginning. This phenomenon suggested that the ozone oxidation of terpenes generated ultrafine particles. Coexistent CCs affected the ozone oxidation of α-pinene more than limonene.
机译：使用质子转移反应质谱（PTR-MS）进行的连续测量可用于描述臭氧诱导的萜烯氧化过程中副产物的生产过程。萜烯是从木质建筑材料中排放的，而臭氧是由室内环境中的臭氧空气净化器和复印机产生的。羰基化合物（CCs）是由人类活动（例如吸烟和饮酒）释放的。此外，在萜烯的臭氧氧化过程中会产生CC。因此，共存的CC应会影响臭氧氧化。这项研究基于对PTR-MS分析的使用以及共存CC对氧化产物的影响，着重于对萜烯臭氧氧化过程中副产物的测量。实验在氟塑料袋中进行，该袋中装有α-pine烯或li烯作为萜烯，臭氧和乙醛或甲醛作为共存CC并调节至预定浓度的碳。在将萜烯，臭氧和CC混合后，通过PTR-MS进行连续测量，并监测挥发性有机化合物（VOC）浓度的时间变化。结果表明，尽管开始时观察到高分子量中间体的产生，但高分子量中间体随时间的流逝逐渐消失。这种现象表明萜烯的臭氧氧化产生了超细颗粒。共存的CC对α-pine烯的臭氧氧化的影响大于柠檬烯。

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