Acquisition of a CO2-Laser Fluorination System and a Mass Spectrometer System for Multiple Stable Isotope Analyses

购置 CO2 激光氟化系统和用于多种稳定同位素分析的质谱仪系统

• 批准号: 0129793
• 负责人: Huiming Bao
• 金额: $ 23.59万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2005-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0129793&HistoricalAwards=false
• 关键词: Acquisition; CO2; Laser; Fluorination; System

EAR-0129793BaoThis award provides partial support (55%) for the acquisition of a CO2-laser fluorination system and an isotope-ratio mass spectrometer (IRMS) system for multiple stable isotope analyses (e.g., O, S & N) for geological and environmental samples. These facilities will be installed and operated in the Department of Geology and Geophysics at the Louisiana State University (LSU). This acquisition will greatly improve LSU's existing research infrastructure and enhance current and planned research capabilities of the LSU geochemistry group. In addition, the facilities provide excellent science education and training platform for undergraduate students. The Principal Investigator (PI), Dr. Huiming Bao, recently joined the Department as an Assistant Professor. The instruments will be the primary tool for Bao's research programs in multiple isotope geochemistries of oxygen (all three isotopes: 16O, 17O, & 18O), sulfur (all 4 isotopes: 32S, 33S, 34S, & 36S), and nitrogen (14N & 15N). The capabilities of these new instruments will be used in research and educational activities aimed at a better understanding of elemental cycles in the atmosphere and in surface environments. Immediate research plans include studies of long-term atmospheric deposition of sulfate and nitrate and their post-depositional mobility in Antarctic Dry Valley soil systems (in collaborating with Dr. Marchant at Boston University), oxygen and sulfur isotopic compositions of Archean sulfide and sulfate deposits in South Africa, and sulfate leached from recent and ancient volcanic ashes, all of which will benefit from the availability of a CO2-laser fluorination system and an IRMS that can offer efficient off-line/on-line gas extractions and high-precision multiple isotopic analyses with minimal sample size. ***

EAR-0129793Bao该奖项为购买 CO2 激光氟化系统和同位素比质谱仪 (IRMS) 系统提供部分支持 (55%)，用于地质和环境的多种稳定同位素分析（例如 O、S 和 N）样品。 这些设施将在路易斯安那州立大学 (LSU) 地质与地球物理系安装和运行。此次收购将极大改善路易斯安那州立大学现有的研究基础设施，并增强路易斯安那州立大学地球化学小组当前和计划中的研究能力。 此外，这些设施为本科生提供了良好的科学教育和培训平台。 首席研究员（PI）鲍惠明博士最近加入该系担任助理教授。 这些仪器将成为包在氧（所有三种同位素：16O、17O 和 18O）、硫（所有 4 个同位素：32S、33S、34S 和 36S）和氮（14N）等多种同位素地球化学研究项目中的主要工具。 ＆15N）。这些新仪器的功能将用于研究和教育活动，旨在更好地了解大气和地表环境中的元素循环。 近期研究计划包括研究硫酸盐和硝酸盐的长期大气沉降及其在南极干谷土壤系统中的沉积后迁移性（与波士顿大学的 Marchant 博士合作）、太古代硫化物和硫酸盐沉积物的氧和硫同位素组成南非的氟化物，以及从近代和古代火山灰中浸出的硫酸盐，所有这些都将受益于 CO2 激光氟化系统和 IRMS 的可用性，该系统可以提供高效的以最小的样品量进行离线/在线气体提取和高精度多同位素分析。 ***