Acquisition of a tunable diode laser system (TILDAS) Aerodyne Mini-TILDAS CO2 Isotope Monitor for triple isotope analyses of CO2 gas from carbonates

采购可调谐二极管激光系统 (TILDAS) Aerodyne Mini-TILDAS CO2 同位素监测仪，用于对碳酸盐中的 CO2 气体进行三重同位素分析

• 批准号: 2025107
• 负责人: Zachary Sharp
• 金额: $ 14.28万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2022-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2025107&HistoricalAwards=false
• 关键词: Acquisition; tunable; diode; laser; system

This Division of Earth Sciences Instrumentation and Facilities Program grant supports acquisition of device that permits analysis of all the stable isotopes of Oxygen (16O, 17O and 18O) contained in carbon dioxide gas liberated from carbonate rocks and minerals to enable advanced studies of Earth’s past climate and environmental conditions as recorded in the stratigraphic record. The instrument will serve the research needs of a large number of faculty and students, initially supporting the education of two graduate students, a postdoctoral scientist and two early career scientists on the investigator team. The instrument will be housed in the University of New Mexico Center for Stable Isotopes (CSI) which hosts weekly student seminars and hosts an annual student competition to support meritorious project laboratory analytical costs.A tunable infrared laser direct absorption spectroscopy (TILDAS) will be acquired. The investigators will employ the instrument for triple oxygen isotope studies of sedimentary carbonates as proxies of the temperature of their formation and isotopic composition of formation fluids. A TILDAS tuned for 17O measurements is a new instrument with anticipated analytical precision rivaling the traditional fluorination method. TILDAS analysis times are 30 minutes versus 4 days for fluorination followed by traditional gas source stable isotope ratio mass spectrometry (SIRMS). TILDAS can analyze sample sizes an order of magnitude smaller than SIRMS.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这种地球科学仪器仪器和设施计划的授予授权支持设备的授予，该设备允许对二氧化碳气体中所有氧气（16o，17o和18o）的所有稳定同位素进行分析，从碳酸盐岩石和矿物质释放出来，以启用地球过去的气候和环境条件的高级研究，如记录地球记录。该乐器将满足大量教职员工和学生的研究需求，最初支持两名研究生的教育，一名博士后科学家以及研究人员团队的两名早期职业科学家。该乐器将安置在新墨西哥大学稳定同位素中心（CSI），该中心将举办每周的学生半手，并举办一项年度学生竞赛，以支持优异的项目实验室分析成本。研究人员将使用该仪器进行沉积碳酸盐的三重同位素研究，作为其形成温度和形成液的同位素组成的代理。一种调整为17o测量的Tildas是一种新仪器，具有预期的分析精度，冒着传统氟化方法的风险。 Tildas分析时间为30分钟，而氟化时间为4天，然后是传统的气源稳定同位素比率质谱法（SIRMS）。 Tildas可以分析样本量比Sirm小的数量级。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响评估标准，被认为是通过评估而被视为珍贵的支持。