MRI: Acquisition of Two High-Resolution Mass Spectrometers for Gas and Particle Measurements in Collaborative Laboratory Research and Field Studies

该项目支持购买两种不同的最先进的高分辨率质谱仪，用于对痕量气体和空气中的颗粒进行敏感、实时分析。它们将用于现场和实验室应用。该设备将用于有关卤素和有机物在二次有机气溶胶形成、气候变化和城市空气污染中的作用的多项研究。预计还将有多种其他应用，包括使用这些仪器更好地识别室内和室外气溶胶对人体呼吸健康的影响，以及污染物如何与生物系统相互作用。第一台仪器是Ionicon Analytik公司为气相成分设计的高分辨率质子转移飞行时间质谱仪（PTR-TOF-MS）。第二个是Aerodyne研究公司为气溶胶颗粒设计的高分辨率飞行时间气溶胶质谱仪（TOF-AMS）。这些仪器将成为AirUCI大量研究人员的多用户资源。AirUCI是加州大学欧文分校最近成立的一个有组织的研究单位，主要研究空气污染物的使用、空气质量和影响。知识价值。该仪器的获取和应用将极大地促进我们对大气污染源和通过生物过程产生的空气污染物和大气化合物的反应、它们的影响以及它们如何受到新技术的影响的理解。该设备将在理解微量气体的作用方面取得重大进展，特别是含卤气体和含氧有机物在大气氧化能力和二次有机气溶胶形成中的作用。这些研究对气候变化和城市空气污染有直接的应用。使用该设备进行的实验将揭示大气中非均相化学反应的形成、命运和影响的先前未被认识的途径。结果对于评估新能源技术对这些过程的影响也很重要。更广泛的影响。使用获得的仪器产生的结果将通过研究会议、同行评审出版物、互联网和公共媒体来源传播。这些数据对于制定具有成本效益的控制战略以应对地方和区域空气污染对气候变化的影响至关重要。这项研究还将在未来五年内为至少75名研究生和博士后以及一些本科生提供尖端仪器及其应用于重要大气问题的培训。从历史上看，受训者大多来自科学界代表性不足的群体，预计这种情况将继续存在。此外，该仪器将用于向K-12教师介绍空气污染和气候变化背后的知识和基础科学的现状，并向公众说明这些。博士后指导。AirUCI的教师有一个强大的博士后指导计划，不仅提供最先进的研究培训，而且通过定期向整个研究所、年度研讨会和AGU等专业会议展示他们的研究成果，提高了他们的沟通技巧。此外，他们还通过AirUCI的外展项目与7-12名教师和公众进行互动。过去的指导工作的成功可以从他们在研究型大学和主要本科大学、州和联邦政府机构（EPA、加州空气资源委员会）和行业的教职人员中找到博士后的位置。

This project supports acquisition of two different state-of-the-art high-resolution mass-spectrometers designed for sensitive, real-time analysis of trace gases and airborne particles. They will be used for both field and laboratory applications. The equipment will be used for multiple studies concerning the role of halogens and organics in secondary organic aerosol formation, climate change and urban air pollution. Multiple other applications are foreseen, including using the instruments to better identify the effect of indoor and outdoor aerosols on human respiratory health and how pollutants interact with biological systems. The first instrument is a high-resolution proton-transfer time-of-flight mass spectrometer (PTR-TOF-MS) from Ionicon Analytik designed for gas-phase constituents. The second is a high resolution time-of-flight aerosol mass spectrometer (TOF-AMS) from Aerodyne Research designed for aerosol particles. These instruments will become a multi-user resource for a large number of researchers from AirUCI, a recently established organized research unit at the University of California at Irvine which focuses on use, air quality, and impacts of air pollutants. Intellectual Merit. The acquisition and application of this instrumentation will significantly advance our understanding of atmospheric sources and reactions of air pollutants and atmospheric compounds produced through biological processes, their impacts and how they are affected by new technologies. This equipment will enable significant advances in understanding the role of trace gases, particularly halogen-containing species and oxygenated organics, in the oxidative capacity of the atmosphere and in secondary organic aerosol formation. The studies have direct applications to climate change and urban air pollution. Experiments using the equipment should reveal previously unrecognized pathways for the formation, fate and impacts of heterogeneous chemical reactions in the atmosphere. Results will also be important in assessing the impacts of new energy technologies on these processes. Broader Impacts. The results produced using the acquired instrumentation will be disseminated through research meetings, peer-reviewed publications, the Internet, and public media sources. These data are critical for developing cost-effective control strategies for local and regional air pollution to climate change. This research will also provide training to at least 75 graduate students and postdoctoral fellows as well as a number of undergraduates over the next five years in cutting edge instrumentation and its application to important atmospheric problems. Historically, trainees have come largely from underrepresented groups in science and it is anticipated that this will continue to be the case. In addition, this instrumentation will be used to introduce K-12 teachers to the current state of knowledge and fundamental science behind air pollution and climate change, and to illustrate these to the public as well. Postdoctoral Mentoring. AirUCI faculty have a strong postdoctoral mentoring program in place that not only provides state-of-the-art research training but also improves communications skills through the presentation of their research at regular intervals to the institute as a whole, at annual workshops and at professional meetings such as AGU. In addition, they interact with 7-12 teachers and the public through the AirUCI outreach programs. Confirmation of the success of past mentoring efforts is found in the placement of their postdoctoral fellows in faculty positions in both research and primarily undergraduate universities, in state and federal government agencies (EPA, California Air Resources Board), and industry.