MRI: Development of an Automated Collection and Extraction System (ACES) for Off- or On-line Chemical Analysis of Organic Aerosol Species

MRI：开发自动收集和提取系统 (ACES)，用于有机气溶胶种类的离线或在线化学分析

• 批准号: 1920361
• 负责人: Andrey Khlystov
• 金额: $ 30.21万
• 依托单位: Nevada System of Higher Education, Desert Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1920361&HistoricalAwards=false
• 关键词: MRI; Development; Automated; Collection; Extraction

This Major Research Instrumentation project will focus on the development of a device to automatically collect and extract organic aerosols from the ambient atmosphere. The system will be compared with conventional samplers in the laboratory and during field sampling campaigns. Automated low-cost aerosol sampling devices are needed for chemical characterization of ambient air pollution.The key features of the instrument will be: (1) reduction of sampling and decomposition artifacts characteristic of filter-based and thermal desorption instruments; (2) a combination of a small particle deposit area with ultra-low solvent volumes, of the order of a microliter, that allows the device to achieve high time resolution and sensitivity; (3) solvent extraction that preserves the chemical composition of the sample; (4) the extraction efficiency is enhanced by using elevated solvent temperature and pressure; and (5) the flexibility of use, as it can be used for off-line collection or coupled to an online instrument.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这一主要研究仪器项目将侧重于开发一种自动收集和提取环境大气中有机气溶胶的设备。 该系统将在实验室和实地采样活动中与传统采样器进行比较。 自动化低成本气溶胶采样装置是环境空气污染的化学表征所必需的，该仪器的主要特点是：（1）减少基于过滤器的仪器和热解吸仪器特有的采样和分解人为因素;（2）小颗粒存款面积与微升量级的超低溶剂体积的组合，这允许装置实现高的时间分辨率和灵敏度;（3）溶剂萃取，其保留样品的化学组成;（4）通过使用升高的溶剂温度和压力来提高萃取效率;和（5）使用的灵活性，因为它可以用于离线收集或耦合到一个在线仪器。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。