MRI: Development of the Trace Organic Gas Analyzer - Time of Flight Mass spectrometer (TOGA-TOF)

该项目涉及开发一种增强型仪器，以研究大气中微量气体的组成。新仪器将能够在很短的时间内以极低的浓度检测一大套大气成分(100种化合物)(样本收集在25秒内)。该仪器可以在地表和平流层下部使用，也可以在污染和清洁环境中使用。这一新仪器将加强我们对气相化学的理解，并可能导致对相关空气质量和气候问题的新见解。痕量有机气体分析仪(TOGA)将与飞行时间(TOF)质谱仪耦合。TOGA-TOF的开发包括建造新的进样和低温样品浓缩器，集成高分辨率TOF，以及优化集成系统以最大限度地提高其定性和定量能力。TOGA-TOF将是一个分析系统，能够以合理的采集速率(1分钟)在整个挥发性范围(C2-C12或更高)提供全面的VOC测量。该仪器量化的一套挥发性有机化合物测量将足以改善对大气光化学状态的理解和建模。

This project involves the development of an enhanced instrument to study the composition of trace gases in the atmosphere. The new instrument will be able to detect a large suite of atmospheric constituents (100 compounds) at very low concentrations over short time periods (samples are collected over 25-seconds). The instrument can be used at the surface and all the way to the lower stratosphere, as well as in both polluted and clean environments. This new instrument will enhance our understanding of gas phase chemistry and is likely to lead to new insights on related air quality and climate issues.A trace organic gas analyzer (TOGA) will be coupled to a time-of-flight (TOF) mass spectrometer. The development of the TOGA-TOF involves the construction of a new inlet and cryogenic sample concentrator, integration of the high resolution TOF, and optimization of the integrated system to maximize its qualitative and quantitative capabilities. The TOGA-TOF will be an analytical system capable of providing comprehensive VOC measurements throughout the volatile range (C2-C12 and possibly higher) at reasonable acquisition rates (1 minute). The suite of volatile organic compound measurements quantified by the instrument will be enough to improve understanding and modeling of the photochemical state of the atmosphere.