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

该项目包括购置一台同位素比质谱仪(IRMS)和样品制备设备，用于对大气、海洋、地质和地下水样品进行稳定同位素分析。IRMS可以非常精确地测量稳定的同位素丰度(如碳、氧、氮、硫等)。关于选定的参考标准。分析各种天然物质中的稳定同位素比率具有许多地球物理和生态学应用。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。纽约州立大学石溪IRMS设施的主要用途将是进一步加强石溪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。同位素比质谱仪是量化大气中痕量气体物种的相对来源强度并利用这一信息评估人类活动对这些物种的影响程度的一种极其有价值的方法。稳定同位素还可用作生物、化学或物理机制的示踪剂，而且质谱仪设施还将允许对海洋和地下水样品(有机碳、水、碳酸盐)进行分析。来自几个系和研究所的许多石溪教授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、海相碳酸盐、碳酸盐岩和海洋沉积物中的有机碳。这个IRMS设施将代表着对Suy Stony Brook的一般科学研究能力的重大改进。

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.