Japan Geoscience Union Meeting 2023

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[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques

[M-TT38] Frontiers in Geochemistry

Fri. May 26, 2023 1:45 PM - 3:00 PM 201B (International Conference Hall, Makuhari Messe)

convener:Hiroyuki Kagi(Geochemical Research Center, Graduate School of Science, University of Tokyo), Shogo Tachibana(UTokyo Organization for Planetary and Space Science, University of Tokyo ), Yusuke Yokoyama(Atmosphere and Ocean Research Institute, University of Tokyo), Chairperson:Hiroyuki Kagi(Geochemical Research Center, Graduate School of Science, University of Tokyo), Shogo Tachibana(UTokyo Organization for Planetary and Space Science, University of Tokyo), Yusuke Yokoyama(Atmosphere and Ocean Research Institute, University of Tokyo)

1:45 PM - 2:00 PM

[MTT38-01] The leading edge of compound-specific isotope analysis: Carbon and nitrogen isotope analysis of organic compounds to understand biogeochemical and ecological material cycles.

*Nanako O. Ogawa1, Yoshinori Takano1, Naohiko Ohkouchi1 (1.Japan Agency for Marine-Earth Science and Technology)

Keywords:compound-specific isotope analysis, amino acids, nucleobases, carbon isotope, nitrogen isotope

Compound-Specific Isotope Analysis (CSIA) of organic compounds is a recognized and widely practiced research method that originated in the 1960s and has been used in various fields of science ever since. The advancement of CSIA studies of organic compounds derived from specific organisms and/or biosynthetic processes (biomarkers and chemical fossils) has undergone several breakthroughs, and the evolution and development of analytical techniques have always accompanied these. For example, the introduction of the Gas Chromatograph/Isotope Ratio Mass Spectrometer (GC/IRMS) in the 1990s brought a wave of fatty acid CSIA-based paleoenvironmental studies. In the 2000s, GC/IRMS for nitrogen CSIA and nano Elemental Analyzer/IRMS (nano EA/IRMS) for carbon and nitrogen CSIA of non-volatile compounds were developed, respectively, and subsequently employed extensively to understand ecosystem processes, ocean nitrogen cycles, and other applications.
In this talk, we will introduce the latest advances in carbon and nitrogen CSIA techniques for amino acids and nucleobases we have developed based on high-performance liquid chromatography with fraction collector (FC-HPLC) and nano EA/IRMS systems and discuss their potential benefits as well as challenges to be overcome.