Acquisition of a Gas-Source Isotope Ratio Mass Spectrometer (GS-IRMS) to upgrade the University of Alabama Geological Sciences Stable Isotope Laboratory

采购气源同位素比质谱仪 (GS-IRMS) 以升级阿拉巴马大学地质科学稳定同位素实验室

• 批准号: 0949303
• 负责人: C. Frederick Andrus
• 金额: $ 20万
• 依托单位: University of Alabama Tuscaloosa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0949303&HistoricalAwards=false
• 关键词: Acquisition; Gas; Source; Isotope; Ratio

0949303AndrusThis award will enable the purchase of an isotope ratio mass spectrometer, an in-line continuous flow carbonate/CO2 extraction device, and ancillary equipment to couple the new instrumentation to existing devices. The major analytical requirements are carbon and oxygen isotope analysis in accretionary carbonates, like mollusks, brachiopods, corals, fish and speleothems. Deuterium and oxygen isotope ratios are also routinely analyzed in water samples. Other research focuses on nitrogen isotope variability in biominerals and organic sediments. Research foci are biomineralization, terrestrial and marine paleoclimate reconstructions, paleoecology, geoarchaeology, and collaborative efforts with anthropologists marine biologists. This grant will allow the facility to have two parallel IRMS set-ups - decreasing maintenance and repair and allowing higher data throughput. The PIs will also be able to analyze deuterium isotopes in continuous flow obviating off-line preparation for later dual-inlet measurement. The Alabama Stable Isotope Lab is currently directed by the co-PI. A full-time research technician is supported by the institution. Day-to-day maintenance is supported by PIs' research grants and user fees. Currently, income exceeds maintenance and expendables costs. The stable isotope lab is routinely used for graduate and undergraduate courses. Research courses for undergraduates also utilize stable isotope measurements (hands on). Undergraduates are routinely hired for hourly lab work and thus receive training. A second IRMS will allow enhanced student use. Several K-12 outreach programs currently use the facility. A McNair Scholar program exists for stimulating underrepresented student participation.***

0949303Andrus 该奖项将允许购买同位素比质谱仪、在线连续流碳酸盐/二氧化碳提取装置以及将新仪器与现有设备耦合的辅助设备。主要的分析要求是对增生碳酸盐（如软体动物、腕足动物、珊瑚、鱼类和洞穴动物）的碳和氧同位素分析。水样中的氘和氧同位素比率也被常规分析。其他研究重点是生物矿物和有机沉积物中的氮同位素变异性。研究重点是生物矿化、陆地和海洋古气候重建、古生态学、地质考古学以及与人类学家和海洋生物学家的合作。这笔拨款将允许该设施拥有两个并行的 IRMS 设置 - 减少维护和维修并允许更高的数据吞吐量。 PI 还能够在连续流中分析氘同位素，从而避免为后续双入口测量进行离线准备。阿拉巴马稳定同位素实验室目前由联合首席研究员领导。该机构支持一名全职研究技术人员。日常维护由 PI 的研究资助和使用费支持。目前，收入超过了维护和消耗品成本。稳定同位素实验室通常用于研究生和本科生课程。本科生的研究课程也利用稳定同位素测量（实践）。本科生通常会被聘用按小时进行实验室工作，从而接受培训。第二个 IRMS 将允许增强学生的使用。目前，多个 K-12 外展项目正在使用该设施。麦克奈尔学者计划旨在刺激代表性不足的学生参与。***