MRI R2: Acquisition of the next generation IRMS and CRDS for the SERC Stable Isotope Laboratory

“该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)提供资金的。”这笔资金用于SERC稳定同位素实验室(SIL)的下一代质谱仪，并要求购买一个新的同位素比质谱仪(IRMS)和两个腔衰荡光谱(CRDS)系统。新一代Delta V IRMS系统将配备氢收集器，以测量水、散装OM和生物标志物中的D/H比。新的Delta V Plus IRMS将配备一个带可变电阻的放大器增益开关，用于丰富的15N分析。一个CRDS系统，一个Picarro iTOC-CRDS同位素碳分析仪，将使实验室能够测量海水中的总有机碳(TOC)、溶解有机碳(DOC)和溶解无机碳(DIC)，包括碳同位素组成。拟议的仪器将为该设施增加新的能力。更广泛的影响拟议的工具将大量参与研究生的培训和研究。还有一个专门的稳定同位素生物地球化学研究生班，使用这些仪器。在为科学界代表性不足的个人(本科生和研究生)提供研究机会方面，SLI有着良好的记录。SILL小组还参加了各种外展项目，包括LTER和GEOSCOPE。这些计划旨在揭露和吸收学生(小学/高中)参与南佛罗里达海洋系统的研究项目。SIL集团还向不同的政府机构提供了用于管理目的的数据。

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."The funds for the next generation of mass spectrometers for the SERC Stable Isotope Laboratory (SIL), with a request for one new isotope ratio mass spectrometer (IRMS) and two Cavity Ring-down Spectroscopy (CRDS) systems. The new next generation Delta V IRMS system will have hydrogen collectors to allow for the measurement of D/H ratios in water, bulk OM, and biomarkers. The new Delta V Plus IRMS will come with an amplifier gain switch with a variable resistor for enriched 15N analyses. One CRDS system, a Picarro iTOC-CRDS Isotopic Carbon Analyzer will allow the lab to measure total organic carbon (TOC), dissolved organic carbon (DOC) and dissolved inorganic carbon (DIC) in marine waters including carbon isotopic compositions. The proposed instrumentation will add new capabilities to the facility. Broader ImpactsThe proposed instruments will be heavily involved with the training and research of graduate students. There is also a specific graduate class in stable isotope biogeochemistry which uses the instruments. The SIL has a good record of providing research opportunities for underrepresented individuals in the sciences (both undergraduate and graduate level). The SIL group has also participated in various outreach projects including LTER's and GEOSCOPE. These programs are designed to expose and include student (elementary /high school) in research projects in the South Florida marine system. The SIL group has also provided different government agencies with data used for management purposes.