Upgrade of a Stable Isotope Mass Spectrometer by the Addition of an Automated Carbonate Preparation Device

通过添加自动碳酸盐制备装置来升级稳定同位素质谱仪

• 批准号: 9905887
• 负责人: David Dettman
• 金额: $ 5.86万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-15 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9905887&HistoricalAwards=false
• 关键词: Upgrade; Stable; Isotope; Mass; Spectrometer

9905887DettmanThis grant provides partials support for the acquistion of an automated carbonate preparation unit to be attached to a gas ratio mass spectrometer at the University of Arizona. This instrument will automate the stable isotope analysis of small carbonate samples for a large group of researchers at the University of Arizona. The primary users of this instrument within the Geosciences Department will be David Dettman, Andrew Cohen, Jay Quade and Karl Flessa. It is expected that researchers from the Tree Ring Laboratory, the Renewable Natural Resources Department, and the Ecology and Evolutionary Biology Department will make use of this facility. It will also be made available to faculty at other institutions; planned cooperative work includes researchers from Arizona State University, the California Academy of Sciences, and Virginia Tech.Paleoclimate studies and paleo-ecology are the primary focus of the work to which this instrument will be applied. The automated carbonate preparation unit is optimized for the processing of large numbers of very small samples (on the order of 10 micrograms of CaCO3). These capabilities are needed for a number of lines of research currently underway in this department. An example is the use of seasonal changes in the isotopic composition of micro-sampled growth bands in shells to infer changes in hydrology and climate. Similar studies are underway utilizing whole shells of ostracodes, a micro-crustacean. In addition to paleoclimate studies using these methods, current research in soil geochemistry, paleolimnology, uplift histories of the Rockies and the Himalaya, glaciology, and economic geology will make use of this instrument. It will greatly improve the output and efficiency of all researchers making use of carbonate isotope geochemistry by eliminating the labor involved in manually preparing carbonate samples or by eliminating long turn-around times when samples are sent to other labs for processing. The carbonate unit will be attached to a currently underutilized mass spectrometer, greatly increasing the productivity of this valuable analytical instrument. ***

9905887Dettman 这笔赠款为购买自动碳酸盐制备装置提供部分支持，该装置将连接到亚利桑那大学的气体比率质谱仪。该仪器将为亚利桑那大学的一大群研究人员自动进行小型碳酸盐样品的稳定同位素分析。 该仪器在地球科学系的主要用户是 David Dettman、Andrew Cohen、Jay Quade 和 Karl Flessa。 预计树轮实验室、可再生自然资源部以及生态与进化生物学部的研究人员将使用该设施。它还将提供给其他机构的教师；计划中的合作工作包括来自亚利桑那州立大学、加州科学院和弗吉尼亚理工大学的研究人员。古气候研究和古生态学是该仪器将应用的工作的主要重点。自动碳酸盐制备装置针对大量极小样品（大约 10 微克 CaCO3）的处理进行了优化。 该部门目前正在进行的许多研究都需要这些能力。 一个例子是利用贝壳微采样生长带同位素组成的季节变化来推断水文和气候的变化。类似的研究正在进行中，利用介形类（一种微型甲壳类动物）的整个壳。 除了使用这些方法进行古气候研究之外，当前的土壤地球化学、古湖泊学、落基山脉和喜马拉雅山隆起历史、冰川学和经济地质学等研究也将利用该仪器。它将大大提高所有利用碳酸盐同位素地球化学的研究人员的产出和效率，消除了手动制备碳酸盐样品所涉及的劳动力，或消除了将样品发送到其他实验室进行处理时的漫长周转时间。碳酸盐装置将连接到目前未充分利用的质谱仪上，从而大大提高这种有价值的分析仪器的生产率。 ***