Acquisition of Mass Spectrometry Equipment for In Situ Measurements of Trace-level Organic Compounds in the Ambient Atmosphere

该主要研究基础设施（MRI）奖将为购买和开发用于现场和实时分析空气中痕量有机化合物的仪器提供支持。这将使研究有机物质在整个地球大气中的排放、反应和运输成为可能，特别是森林和植物从生物角度排放到大气中的碳氢化合物和含氧碳氢化合物。这些仪器将基于漂移管反应质谱（DTRMS）。该技术灵敏度高，选择性好，可用于高频测量，这使其应用于森林冠层以上通量测量成为可能。其中一台DTRMS仪器将从最初的开发商那里购买，并将立即部署到正在进行的关于生物向大气排放的实验室和实地研究项目中。这些项目正在与华盛顿州立大学和俄勒冈研究生院合作进行。另一种仪器将在蒙大拿州立大学开发。该仪器将基于三重四极杆，这将使其更加通用和选择性。该仪器还可以进行其他类型的测量，包括有机硝酸盐的测量。

This Major Research Infrastructure (MRI) award will provide support for the purchase and development of instrumentation for the in situ and real-time analysis of trace-level organic compounds in air. This will enable studies of the emissions, reactions and transport of organic substances throughout the Earth's atmosphere, in particular hydrocarbons and oxygenated hydrocarbons that are biogenically emitted into the atmosphere by forests and plants. The instruments will be based on Drift Tube Reaction Mass Spectrometry (DTRMS). This technology is sensitive, selective, and can be used for high frequency measurements, which makes its application to flux measurements above forest canopies possible. One of the DTRMS instruments will be purchased from the original developer fully operational and will be deployed immediately to ongoing laboratory- and field-based research projects on biogenic emissions to the atmosphere. These projects are being carried out in collaboration with Washington State University and the Oregon Graduate Institute. A second instrument will be developed at Montana State University. This instrument will be based on a triple quadrupole which will make it more versatile and selective. Additional types of measurements will be possible with that instrument, including the measurement of organic nitrates.