Development of a high-resolution gas source isotope ratio mass spectrometer

高分辨率气源同位素比质谱仪的研制

• 批准号: 0949336
• 负责人: John Eiler
• 金额: $ 74.94万
• 依托单位: California Institute of Technology
• 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: 2010-10-01 至 2012-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0949336&HistoricalAwards=false
• 关键词: Development; resolution; gas; source; isotope

0949336EilerThis award provides funding to develop a high-performance gas-source isotope ratio mass spectrometer (IRMS) for analyzing multiply-substituted isotope patterns in various materials. The PIs will collaborate directly with engineers from Thermo Fisher Scientific ('Thermo'). The new instrument designs relies on combining an inlet system and ion source from an existing gas-source IRMS (the MAT 253) with the analyzer and detector array of an existing large-radius, double-focusing multi-collector mass spectrometer (the Neptune). The design goal will be to increase maximum mass resolution for rare isoptologues. The hybrid will achieve high mass resolution, high sensitivity, and high precision. The primary motivation is to advance "clumped isotope geochemistry" - the study of naturally occurring multiply substituted isotopologues. Current analytical limitations make isotopologue measurement extremeley challenging. Clumped isotope geochemistry is a rapidly developing new field with potential extensions to materials other than carbon dioxide will potentially provide many new scientific insights. The overall scientific near-term goals are to advance "clumped isotope" thermometers for methane and other hydrocarbon gases, understand reduced atmospheric gas photochemical lifetimes, and determining possible origins for organic materials. Carbonate clumped isotope thermometry, the most developed current application will immediately benefit from the new instrumentation. The instrument will have broad applicability in paleoclimatology, biogeochemistry, tectonics, atmospheric chemistry, geobiology and environmental science, and will ultimately provide new analytical approaches to organic and inorganic geochemistry. The new instrument will be a resource for training the next generation of isotope geochemists - offering a "new" analytical tool for opening new research avenues. Studies into the basic principles of molecular bonding and reaction mechanisms will also be supported with the enhanced analytical capabilities. The partnership with Thermo will eventually lead to a commercially-available instrument. ***

0949336Eilerthis奖提供资金，以开发高性能气体源同位素比率质谱仪（IRMS），用于分析各种材料中的多取代同位素模式。 PI将直接与Thermo Fisher Scientific（“ Thermo”）的工程师合作。新仪器的设计依赖于将现有气体源IRMS（MAT 253）的入口系统和离子源与现有的大型摩擦，双重焦点的多重收集器质谱仪（Neptune）的分析仪和检测器阵列相结合。设计目标将是增加稀有等距学的最大质量分辨率。杂种将获得高质量分辨率，高灵敏度和高精度。主要的动机是推进“集结的同位素地球化学” - 对天然发生的多重替代同位素学的研究。当前的分析局限性使同位素测量极具挑战性。集结的同位素地球化学是一个迅速发展的新领域，其潜在扩展到二氧化碳以外的材料可能会提供许多新的科学见解。总体科学的近期目标是推进甲烷和其他碳氢化合物气体的“集结同位素”温度计，了解减少的大气气体光化学寿命，并确定有机材料的可能起源。碳酸盐团块同位素温度计，最发达的当前应用将立即受益于新仪器。该仪器将在古气候学，生物地球化学，构造学，大气化学，地球生物学和环境科学方面具有广泛的适用性，并最终将提供有机和无机地球化学的新分析方法。新仪器将是培训下一代同位素地球化学主义者的资源 - 提供开放新研究途径的“新”分析工具。分子键合和反应机制的基本原理的研究也将通过增强的分析能力支持。与Thermo的合作关系最终将导致商业上可用的工具。 ***