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Mass Spectrometry of Airborne Nanoparticles

空气中纳米粒子的质谱分析

基本信息

批准号：
0808972
负责人：
Murray Johnston
金额：
$ 50.9万
依托单位：
University of Delaware
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2008
资助国家：
美国
起止时间：
2008-08-01 至 2012-02-29
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808972&HistoricalAwards=false
关键词：
Mass Spectrometry Airborne Nanoparticles

项目摘要

Professor Murray Johnston of the University of Delaware is supported by the Analytical and Surface Chemistry Program in the Division of Chemistry and by the Atmospheric Chemistry Program in the Division of Atmospheric Sciences to develop a nanoparticle inlet for use with aerosol mass spectrometry, and to use it for characterization of airborne nanoparticles in laboratory and field studies. At present, on-line sampling of nanoparticles from ambient air into the vacuum of a mass spectrometer is inefficient, making it difficult to study nanoparticle formation and reactivity. The inlet being developed in this work will aim to transmit nanoparticles over a broad size range, especially particles smaller than 10 nm, so that their composition can be determined. This analytical methodology will be used to study the formation and growth of nanoparticles in a coastal marine environment, and to study the formation of secondary organic aerosols. The project will provide important information on the source and fate of nanoparticles in the environment so that their impacts on human health and the environment can be assessed. The methodology is relevant to the study of human exposure to nanoparticles in the workplace and to the study of large molecules and macromolecular assemblies in biological systems. A diverse group of graduate and undergraduate students will be educated in this interdisciplinary area involving chemistry and atmospheric science. The results of field measurements will be used as case studies for environmental chemistry coursework at the University of Delaware, and the general public will be engaged at University sponsored science outreach events.

特拉华州大学的Murray约翰斯顿教授得到了化学系分析和表面化学项目以及大气科学系大气化学项目的支持，开发了一种用于气溶胶质谱法的纳米颗粒入口，并将其用于实验室和现场研究中空气中纳米颗粒的表征。目前，从环境空气到质谱仪的真空中的纳米颗粒的在线采样是低效的，使得难以研究纳米颗粒的形成和反应性。在这项工作中开发的入口旨在传输宽尺寸范围内的纳米颗粒，特别是小于10 nm的颗粒，以便确定其组成。这种分析方法将用于研究沿海海洋环境中纳米颗粒的形成和生长，并研究二次有机气溶胶的形成。该项目将提供有关环境中纳米颗粒的来源和归宿的重要信息，以便评估其对人类健康和环境的影响。该方法与研究工作场所中人类暴露于纳米粒子以及研究生物系统中的大分子和大分子组装有关。研究生和本科生的多元化群体将在这个涉及化学和大气科学的跨学科领域接受教育。实地测量的结果将被用作特拉华州大学环境化学课程的案例研究，公众将参与大学主办的科学推广活动。