Acquisition of a Stable Isotope Ratio Mass Spectrometer and Supporting Instrumentation for Marine Biogeochemical and Paleoceanographic Studies [MRI/RUI]

0320940 Altabet授予达特茅斯的马萨诸塞州大学的这一重大研究仪器奖支持获得同位素比质谱仪（IRMS）、高压液相色谱仪（HPLC）和四极质谱仪（QMS），以继续和扩大对地球化学和古海洋学的研究，强调海洋环境中的氮循环。 IRMS取代了现有的老化和越来越不可靠的仪器，旨在提高吞吐量和可靠性，并保持这项工作所需的必要高精度。 IRMS系统包括用于CNS的连续流接口和元素分析仪，以及用于化合物特定分析的气相色谱仪和用于硝酸盐的气体处理系统。 HPLC将主要用于氨基酸浓度分析，将实验室的能力扩展到一个新的领域。 QMS将用于两个目的。 在实验室中，它将用于排除IRMS制备系统的故障，特别是检测泄漏。 第二个应用是作为船用高精度气体比例分析的航海仪器，特别是解决N2/Ar。 该仪器将被纳入教学和研究，涉及本科生和研究生在马萨诸塞大学，无论是在达特茅斯校园，并通过新的校园间海洋科学与技术研究生院全系统。 该奖项由NSF海洋科学部支持。

0320940AltabetThis Major Research Instrumentation award to the University of Massachusetts, Dartmouth supports acquisition of an isotope ratio mass spectrometer (IRMS), a high pressure liquid chromatograph (HPLC) and a quadrupole mass spectrometer (QMS) to continue and extend research into biogeochemistry and paleoceanography, emphasizing nitrogen cycling in the marine environment. The IRMS replaces an existing, aging and increasingly unreliable instrument, and is intended to improve throughput and reliability and maintain the necessary high precision this work requires. The IRMS system includes a continuous-flow interface and elemental analyzer for CNS, as well as a gas chromatograph for compound-specific analyses, and a gas handling system for nitrate. The HPLC will be mainly used for amino acid concentration analysis, extending the capabilities of the lab into a new area. The QMS will be used for two purposes. In the laboratory, it will be used to troubleshoot the IRMS preparation system, particularly to detect leaks. The second application is as a seagoing instrument for shipboard high precision gas ratio analysis, especially addressing N2/Ar. The instrumentation will be incorporated into teaching and research involving both undergraduate and graduate students at U Mass, both on the Dartmouth campus, and system-wide via the new Intercampus Graduate School of Marine Science and Technology. The award is supported by the Ocean Sciences Division of NSF.***