3C-O2-1525 PDF
イメージング質量分析によるマーチソン隕石含有物の分布測定
The Murchison Meteorite have been intensively studied for their prebiotic organic compounds. The elemental composition of this meteorite, including amino acids, hydrocarbons, carboxylic acids, alcohols and ketones, has been investigated by combination of Gas or Liquid chromatography and mass spectrometry analysis. In the next step, the spatial distribution of these organic compounds in Meteorite becomes concerned information. For surface analysis of these meteorite, Raman imaging were used conventionally. However, the detailed molecular composition of organic matter is difficult to be identified by this observation technique. Thus, we try to use Matrix Assisted Laser Desorption/Ionization (MALDI) method for soft ionization of organic matter in the Murchison Meteorite. We use stigmatic imaging mass spectrometer “MULTUM-IMG2” which was developed in Osaka University and achieved spatial resolution of 1 μm and mass resolution of m/Δm 10000. Ion distributions at the sample plate are magnified and projected with the ion optical lens system onto the detector. We applied this new apparatus to imaging observation of Murchison Meteorite, and the detailed results of this experiment will be reported in the conference.