Measuring triple oxygen (16O, 17O and 18O) and carbon (12C, 13C) isotopes in small samples of carbon dioxide by laser spectroscopy

通过激光光谱法测量少量二氧化碳样品中的三氧（16O、17O 和 18O）和碳（12C、13C）同位素

• 批准号: EP/S030417/1
• 负责人: David Hodell
• 金额: $ 2.52万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FS030417%2F1
• 关键词: Measuring; triple; oxygen; 16O; 17O

I propose to spend 5 months at Harvard University developing and learning a new analytical method for measuring triple oxygen (16O, 17O, 18O) and carbon (12C, 13C) isotopes in small samples of CO2 produced from carbonate minerals using mid-infrared spectroscopy. The development will be conducted collaboratively with Prof. Daniel Schrag at the Harvard Center for the Environment (see letter of support) and Aerodyne Research, a private-sector company specializing in spectroscopy located in Billerica, Massachusetts, only 20 miles northwest of Boston. The method will permit the simultaneous analysis of 18O/16O, 13C/12C, and 17O/16O in CO2 in small samples of CO2 gas equivalent to microgram quantities of calcium carbonate with no spectral interferences. Laser spectroscopy offers a distinct advantage over conventional isotope ratio mass spectrometry (IRMS) for the measurement of isotopic ratios in CO2 because isobaric interferences on mass 45 precludes the direct measurement of 17O/16O by IRMS. This new approach will open new avenues of research for measuring 17O/16O in CO2 and carbonate minerals that has been hitherto difficult to measure by IRMS. The collaboration will lead to a proposal to acquire a similar system for the Godwin Laboratory at the University of Cambridge to keep the analytical facility at the forefront of innovative technology for stable isotope geochemistry.

我打算在哈佛大学花5个月的时间开发和学习一种新的分析方法，用于使用中红外光谱法测量碳酸盐矿物产生的CO2小样品中的三重氧（16 O，17 O，18 O）和碳（12 C，13 C）同位素。该开发将与哈佛环境中心的丹尼尔施拉格教授（见支持信）和Aerodyne Research合作进行，Aerodyne Research是一家专门从事光谱学的私营公司，位于马萨诸塞州的比尔里卡，距离波士顿西北仅20英里。该方法将允许同时分析18 O/16 O，13 C/12 C，和17 O/16 O在CO2气体的小样品相当于微克量的碳酸钙，没有光谱干扰。激光光谱法提供了一个明显的优势，传统的同位素比质谱法（IRMS）的同位素比测量CO2，因为质量45的同量异位素干扰排除了直接测量17 O/16 O的IRMS。这种新方法将为测量迄今难以用IRMS测量的CO2和碳酸盐矿物中的17 O/16 O开辟新的研究途径。这项合作将导致一项为剑桥大学戈德温实验室购置类似系统的提议，以使该分析设施保持在稳定同位素地球化学创新技术的最前沿。

项目成果

Detection of significant climatic precession variability in early Pleistocene glacial cycles

• DOI: 10.1016/j.epsl.2020.116137
• 发表时间: 2020-04
• 期刊: Earth and Planetary Science Letters
• 影响因子: 5.3
• 作者: P. Liautaud;D. Hodell;P. Huybers

Continuous and simultaneous measurement of triple-oxygen and hydrogen isotopes of liquid and vapor during evaporation experiments.

在蒸发实验过程中连续、同时测量液体和蒸汽的三氧和氢同位素。

• DOI: 10.17863/cam.65535
• 发表时间: 2021
• 作者: Brady M

Continuous and simultaneous measurement of triple-oxygen and hydrogen isotopes of liquid and vapor during evaporation experiments

蒸发实验期间连续同时测量液体和蒸汽的三氧和氢同位素

• DOI: 10.1002/rcm.9078
• 发表时间: 2021
• 期刊: Rapid Communications in Mass Spectrometry
• 影响因子: 2
• 作者: Brady M