Acquisition of an Isotope Ratio Mass Spectrometer for Analyses of Aquatic, Geologic, and Atmospheric Sciences

购买同位素比质谱仪用于水生、地质和大气科学分析

• 批准号: 9601501
• 负责人: J Kirk Cochran
• 金额: $ 21.52万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-15 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9601501&HistoricalAwards=false
• 关键词: Acquisition; Isotope; Ratio; Mass; Spectrometer

This project consists of the acquisition of an isotope ratio mass spectrometer (IRMS) and sample preparation equipment for stable isotopic analyses of atmospheric, marine, geologic, and groundwater samples. The IRMS permits extremely precise measurements of stable isotope abundances (such as those of carbon, oxygen, nitrogen, sulfur, etc.) with respect to a chosen reference standard. Analysis of stable isotope ratios in various natural substances has numerous geophysical and ecological applications. The applicability of IRMS technology therefore crosses the boundaries among many of the major disciplines, including the geosciences, chemistry, biology, and physics. The principal uses of the SUNY Stony Brook IRMS facility will be to further strengthen Stony Brook's expertise in atmospheric chemistry, specifically with regard to oceanic, terrestrial, and atmospheric interactions, and to complement the institution's existing expertise in the marine and earth sciences. Isotope ratio mass spectrometry is an extremely valuable way to quantify the relative source strengths of trace gas species in the atmosphere and to use this information to evaluate the extent of anthropogenic influences on those species. There are also numerous applications where stable isotopes may be used as tracers of biological, chemical, or physical mechanisms, and the mass spectrometer facility will also permit the analyses of marine and groundwater samples (organic carbon, water, carbonates). Many Stony Brook faculty from several departments and institutes have interests in the stable isotopic composition of a variety of substances, including dissolved organic compounds, marine carbonates, carbonate rocks, and organic carbon in marine sediments. This IRMS facility will represent a major improvement to the general scientific research capability of SUY Stony Brook.

该项目包括获取同位素比质谱仪（IRMS）和样品制备设备，用于大气、海洋、地质和地下水样品的稳定同位素分析。IRMS可以根据选定的参考标准对稳定同位素丰度（如碳、氧、氮、硫等）进行极其精确的测量。各种自然物质中稳定同位素比值的分析具有许多地球物理和生态应用。因此，IRMS技术的适用性跨越了许多主要学科的界限，包括地球科学、化学、生物学和物理学。州立大学石溪分校IRMS设施的主要用途将是进一步加强州立大学石溪分校在大气化学方面的专业知识，特别是在海洋、陆地和大气相互作用方面，并补充该机构在海洋和地球科学方面的现有专业知识。同位素比值质谱法是一种极有价值的方法，可以量化大气中微量气体种类的相对来源强度，并利用这一信息评估对这些种类的人为影响程度。稳定同位素也有许多应用，可以用作生物、化学或物理机制的示踪剂，质谱仪设施也将允许分析海洋和地下水样本（有机碳、水、碳酸盐）。石溪大学许多系和研究所的教师都对各种物质的稳定同位素组成感兴趣，包括溶解的有机化合物、海洋碳酸盐、碳酸盐岩和海洋沉积物中的有机碳。这一IRMS设施将代表着石溪州立大学整体科研能力的重大提升。