MRI Track 1: Acquisition of a Dual-Reagent Chemical Ion Mass Spectrometer for Direct and Detailed Measurements of Atmospheric Chemical Fluxes

MRI 轨道 1：获取双试剂化学离子质谱仪，用于直接详细测量大气化学通量

• 批准号: 2320421
• 负责人: Dylan Millet
• 金额: $ 116.17万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2320421&HistoricalAwards=false
• 关键词: MRI; Track; Acquisition; Dual; Reagent

In this Major Research Instrumentation (MRI) project, the investigators will acquire a new shared, multi-user instrument at the University of Minnesota – Twin Cities. This instrument will enable new observations of both concentrations and fluxes of a wide variety of chemical compounds by the project team, which will enhance their ability to study urban air pollution, nitrogen cycling, indoor and outdoor air quality, plant-microbe interactions, and chemical exchange between surfaces and the atmosphere. This instrument will be used to train a new generation of scientists and experimentalists including graduate and undergraduate students. Additionally, the instrument will enable research projects that include a range of outreach activities including a partnership with the University of Minnesota Urban Outreach-Engagement Center.The instrument to be acquired is a dual-reagent chemical ionization mass spectrometer with high-resolution time-of-flight detection, specifically an Aerodyne Vocus 2R CI-TOF, which is unique in that it is the only instrument that can take field measurements with both hydronium and iodine reagent ions. The CI-TOF will enable a broad range of chemical observational coverage and will be used by a multidisciplinary research team with a broad range of career levels and research projects. There are four key issues that this instrument acquisition will address: (1) the air quality effects of urban fluxes of volatile organic compounds; (2) the cycling and fate of reactive nitrogen in the atmosphere of the agricultural Midwest; (3) the indoor air quality impacts of photocatalytic and ionization purification technologies; and (4) the volatile organic compound mediation of plant-microbe interactions and plant growth.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.

在这个主要的研究工具（MRI）项目中，研究人员将在明尼苏达大学 - 双城大学获得新的共享多用户工具。该仪器将使项目团队对各种化合物的浓度和通量进行新的观察，这将增强其研究城市空气污染，氮气循环，室内和室外空气质量，植物 - 菌丝相互作用以及表面和大气之间的化学交换的能力。该乐器将用于培训新一代的科学家和实验人员，包括研究生和本科生。 Additionally, the instrument will enable research projects that include a range of outreach activities including a partnership with the University of Minnesota Urban Outreach-Engagement Center.The instrument to be acquired is a dual-reagent chemical ionization mass spectrometer with high-resolution time-of-flight detection, specifically an Aerodyne Vocus 2R CI-TOF, which is unique in that it is the only instrument that can take field measurements with both hydronium and iodine reagent离子。 CI-TOF将实现广泛的化学观察性覆盖范围，并将由具有广泛职业水平和研究项目的多学科研究团队使用。该工具采集将解决四个关键问题：（1）挥发性有机化合物的城市通量的空气质量影响； （2）中西部大气中反应性氮的循环和命运； （3）光催化和电离纯化技术的室内空气质量影响； （4）植物 - 微生物相互作用和植物生长的挥发性有机复合中介。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为是通过评估而被视为珍贵的支持。