[EV-09] Lunchtime lecture by Miyake Prize winners

[EV09-01] Tracing origin/cycle of molecules of geo/cosmochemical interest with their natural abundance of isotopologues and isotopomers

Naohiro Yoshida^1,2 (1. Earth-Life Science Institute, Tokyo Tech, 3. National Institute of Information and Communications Technology)

All molecules are composed of numerous isotopically substituted molecular species, just as all elements consist of multiple isotopes. However, their abundances are challenging to measure. We have been striving to enable isotopic abundance measurements at the unexplored molecular level, significantly enhancing the dimension of information related to the complex origins and histories of molecules targeted by earth and planetary science. Techniques such as low-resolution and high-resolution magnetic sector mass spectrometers, NMR, FT-type mass spectrometers, and infrared spectrometers have been appropriately applied to target molecules, and measurement methods have been developed using standard substances. Applications have been explored in areas including greenhouse gases, inorganic salts, alcohols, sugars, amino acids, and hydrocarbons including PAHs from Ryugu, which will be overviewed in this lecture.