Acquisition of Continuous-Flow Stable Isotope Analytical Equipment at Dartmouth College

这笔拨款为达特茅斯学院稳定同位素实验室购买额外的在线外围设备和必要的辅助设备提供部分支持。稳定同位素实验室目前拥有两台稳定同位素质谱仪，一台Finnigan Delta E和一台ThermoFinnigan Delta Plus XL，以及三台在线ThermoFinnigan外围设备，一台元素分析仪和一台气相色谱仪/燃烧系统（GCC）以及一台TC/EA。该实验室还维护着一系列脱机设备，用于从矿物、岩石和水中提取氧气和氢气，以及从有机物、土壤和土壤气体中提取氧气、氢气和碳。目前离线进行的同位素提取程序，包括水分析和碳酸盐分析，将通过在线和自动化外围设备更有效地完成，并且不会影响数据质量。具体而言，需要购买的设备包括用于水样自动在线氢同位素分析的ThermoFinnigan H/Device，用于水样自动在线氢和氧同位素分析的ThermoFinnigan GasBench II系统，用于碳酸盐矿物的碳和氧同位素分析，溶解无机碳的碳同位素分析和土壤二氧化碳的在线分析，以及分析天平。升级后的实验室将支持三个系（地球科学、环境研究和生物科学）的教师和学生的研究，并与新罕布什尔州其他机构的研究人员进行大量合作。＊＊＊

0132018FengThis grant provides partial support for the purchase of additional online peripheral devices as well as necessary ancillary equipment for the stable isotope laboratory at Dartmouth College. The stable isotope lab currently houses two stable isotope mass spectrometers, a Finnigan Delta E and a ThermoFinnigan Delta Plus XL, and three online ThermoFinnigan peripheral devices, an Elemental Analyzer and a Gas Chromatograph/ Combustion system (GCC) and a TC/EA. The lab also maintains a wide array of offline equipment for the extraction of oxygen and hydrogen from minerals, rocks and waters, and oxygen, hydrogen and carbon from organic matter, soils and soil gas. Isotope extraction procedures currently done offline, including water analyses and carbonate analyses, will be done more efficiently and with no compromise to data quality by online and automated peripheral devices. Specifically equipment to be purchased includes a ThermoFinnigan H/Device for automated online hydrogen isotope analysis of water samples, a ThermoFinnigan GasBench II system for automated online hydrogen and oxygen isotope analysis of water samples, carbon and oxygen isotope analysis of carbonate minerals, carbon isotopic analysis of dissolved inorganic carbon and online analysis of soil CO2, and an analytical balance. The upgraded lab will support research by faculty and students in three departments (Earth Sciences, Environmental Studies and Biological Sciences) and numerous collaborative efforts with researchers from other institutions in New Hampshire. ***