Acquisition of a Stable Isotope Mass Spectrometer with Automated Preparation Systems

小行星9617878 这笔赠款提供了156 271美元，作为购买一台新的连续流动稳定同位素比质谱仪（CF-SIRMS）的部分费用，该质谱仪配有自动碳酸盐样品制备和引入装置（“基尔装置”）。 新的SIRMS将补充现有但过时的VG Prism II质谱仪（大约1985年），并将有利于在佛罗里达谁利用稳定同位素在他们的研究和古海洋学研究的大样本吞吐量的具体需求，古湖沼学和古气候学需要对小样本进行大量分析（低至10微克），包括碳酸盐微体化石、珊瑚和腹足类的氧同位素分析，作为古水温的指标，ODP岩心的稳定同位素地层分析和生物硅中氧同位素记录的可行性评估（硅藻和放射虫）作为交替和互补的气候代用品碳酸盐微体化石的稳定同位素分析。 此外，连续流SIRMS将允许测量单一气体样品的碳、氮和硫同位素，从而利用海洋无脊椎动物和脊椎动物骨骼材料的稳定同位素分析作为古生态学的替代物，分析湖泊沉积物中有机物的C/N、del 13-C和del 15- N作为古生产力和养分循环的指标，以骨胶原稳定同位素分析为基础的古饮食研究，以及利用稳定同位素作为有机物命运示踪剂的早期成岩作用和营养动力学研究。 ***

9617878 Hodell This grant provides $156,271 as partial support of the costs of acquiring a new continuous flow, stable isotope ratio mass spectrometer (CF-SIRMS) with an automated carbonate sample preparation and introduction device ("Kiel device"). The new SIRMS will complement an existing but dated VG Prism II mass spectrometer (circa 1985) and will benefit a large group of faculty at Florida who utilize stable isotopes in their research and have specific needs for large sample throughput for studies in paleooceanography, paleolimnology and paleoclimatology that require large numbers of analyses on small samples (down to 10 micrograms) from marine and lacustrine sediment cores including, oxygen isotopic analyses of carbonate microfossils, corals and gastropods as indicators of paleo water temperatures, stable isotope stratigraphic analysis of ODP cores and assessment of the viability of the oxygen isotopic records contained in biogenic silica (diatoms and radiolarians) as an alternate and complimentary climate proxy to stable isotopic analysis of carbonate microfossils. Additionally, continuous flow SIRMS will allow measurement of carbon, nitrogen and sulfur isotopes on a single gas sample enhancing studies utilizing, stable isotopic analyses of marine invertebrate and vertebrate skeletal material as proxies of paleoecology, analysis of C/N, del 13-C and del 15- N of organics in lacustrine sediments as indicators of paleoproductivity and nutrient cycling, studies of paleodiet based on stable isotopic analyses of bone collagen and studies of early diagenesis and trophic dynamics utilizing stable isotopes as tracers of the fate of organic matter. ***