Detailed Chemical Characterization of Atmospheric Organics by Gas Chromatography with Soft Ionization Mass Spectrometry

通过气相色谱法和软电离质谱法对大气有机物进行详细的化学表征

• 批准号: 435771-2013
• 负责人: Chan, Arthur
• 金额: $ 2.33万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=632892
• 关键词: Detailed; Chemical; Characterization; Atmospheric; Organics

Human activities emit a large amount of organic compounds into the atmosphere, many of which undergo reactions to form particulate matter. Particulate matter has important effects on air quality, global climate and human health. However, the sources, properties and reactions of organic compounds leading to particulate matter formation are poorly understood. In this research program, we investigate the chemical composition of urban emission sources and study their atmospheric reactions.Using advanced instrumentation, we develop methods to measure detailed molecular structures of organic compounds and apply these techniques to important urban emission sources, such as motor vehicle engines and wood burning exhaust. Knowledge of their chemical composition allows us to understand their climate and health impacts. We also study atmospheric reactions in the laboratory by carrying out simulation experiments and measure the changes in composition. These experimental results will lead us to develop a new framework, linking chemical composition to model predictions of particulate formation. This framework will be adopted in air quality models and allow policymakers to understand and mitigate particulate pollution.

人类活动向大气中排放大量有机化合物，其中许多化合物发生反应形成颗粒物。颗粒物对空气质量、全球气候和人类健康具有重要影响。然而，导致颗粒物形成的有机化合物的来源，性质和反应知之甚少。本研究项目调查城市排放源的化学成分，研究它们在大气中的反应，利用先进的仪器设备，开发出测定有机化合物详细分子结构的方法，并将这些技术应用于重要的城市排放源，如机动车发动机和木材燃烧废气。了解它们的化学成分使我们能够了解它们对气候和健康的影响。我们还在实验室中通过进行模拟实验来研究大气反应，并测量成分的变化。这些实验结果将引导我们开发一个新的框架，将化学成分与颗粒形成的模型预测联系起来。这一框架将在空气质量模型中采用，并使政策制定者能够了解和减轻颗粒物污染。