脱離エレクトロスプレーイオン化技術を利用した地球外物質中の可溶性有機物の高質量分解能イメージング

抄録

A wide variety of organic matter have been detected in extraterrestrial samples including meteorites and asteroid Ryugu samples, which suggests that large amount of organic matter were provided to the primitive Earth and possibility of contribution to the emergence of life. From this perspective, it is extremely important to understand the origin and chemical evolution of extraterrestrial organic matter. Extraterrestrial organic matter is thought to have formed and evolved through various processes during the formation of the solar system, from molecular clouds to protoplanetary disks, and small bodies. To understand these processes, it is necessary to reveal where the organic matter is distributed in extraterrestrial samples composed of tiny mineral particles, especially their relationship to minerals. Desorption electrospray ionization (DESI)-mass spectrometry (MS) imaging is a powerful tool for visualizing of spatial distribution of soluble organic matter (SOM) in solid samples. In this paper, I review the principle of DESI-MS imaging and its application to extraterrestrial samples.