Upgrade of a continuous-flow mass spectrometer for automated analyses of isotope ratios of carbon dioxide and nitrous oxide

0930000 Townsend-Small“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。“该合同将支持升级现有的IRMS，以提供额外的分析能力。增强后的能力将用于跟踪城市进程对碳库和氮库的贡献以及碳库和氮库之间的贡献。要求的是甲烷-一氧化二氮预浓缩装置、GC自动进样器（设计用于与预浓缩器一起工作）、特定GC柱以及运输和培训费用。升级将应用于现有仪器。目前有足够的空间和资源。将执行一个收费时间表，以抵消维护和业务费用。将优先考虑PI和学生，并在需要时实施调度系统。PI将管理机构新用户培训。PI将使用新的能力来跟踪城市环境中的N2 O通量。这些已被证明有很大的差异，根据土地使用，农业/城市活动，和污水处理过程。样品吞吐量可以大大增加从拟议的收购。在其他同位素测量将被用来了解自然（呼吸）和人为（化石燃料燃烧）过程的地球化学通量。未来的研究方向包括使用同位素追踪沿海海洋的营养输入和不同植物类型的CO2通量。此次升级的一个主要影响是样本处理能力的大幅提高，这将对所有用户产生涟漪反应，特别是允许研究生获得更快完成论文研究所需的数据。少数民族学生将通过几个UC-I计划得到很好的服务。PI还与非营利性海洋研究所合作，该研究所为K-12外展提供了一个途径。研究工作的结果不仅将在文献和会议上传播，而且将对公共实体和政府机构有直接的效用。***

0930000Townsend-Small"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." This award will support upgrades to an existing IRMS to allow additional analytical capabilities. The enhanced capabilities will be used to track contributions from urban processes into and between carbon and nitrogen pools. Requested is a methane-nitrous oxide preconcentrator unit, GC autosampler (designed to work with the preconcentrator), a specific GC column, and shipping and training costs. The upgrade will be applied to existing instrumentation. Adequate space and resources currently exist. A fee-based schedule will be implemented to offset maintenance and operation costs. Prioritization will be given to PIs and students and a scheduling system will be implemented if needed. The PIs will manage the facility new user training. The PIs will use the new capabilities to track N2O fluxes in urban settings. These have been shown to vary considerably based on land use, agricultural/urban activities, and sewage treatment processes. Sample throughput can be increased substantially from the proposed acquisition. In additional isotopic measurments will be used to understand biogeochemical fluxes from both natural (respiration) and anthropogenic (fossil fuel combustion) processes. Future research directions include using isotopes to trace nutrient inputs to the coastal ocean and CO2 fluxes from different plant types. One main impact of this upgrade will be a substantial increase in sample processing capabilities which will have a ripple effect for all users, particularly allowing graduate students to obtain the data they need to more quickly finish their theses research. Minority students will be well-served through several UC-I programs. The PIs also work with the non-profit Ocean Institute which provides an avenue for K-12 outreach. Results from research efforts will not only be disseminated in the literature and at meetings, but will have a direct utility for public entities and government agencies. ***