Two homologous series of alkylpyridines in the Murchison meteorite
Two homologous series of alkylpyridines in the Murchison meteorite
复制标题
DOI：
10.2343/geochemj.2.0340
复制
发表时间：
2014-11
影响因子：
0.8
通讯作者：
Y. Yamashita;H. Naraoka
中科院分区：
文献类型：
--
作者：
Y. Yamashita;H. Naraoka
版权所有©2014，由日本地球化学会提供。摘录(Krishnamurthy等人，1992)。重同位素丰度表明，更原始的有机化合物可能部分来自星际环境。然而，尽管CCS的有机化合物含量相对较高，但对其极性较低的溶剂提取物的研究很少。最近，利用傅立叶变换回旋共振/质谱仪(FT-ICR/MS)对墨尔奇逊陨石(CM2)的各种溶剂萃取物进行了超高分辨率质谱分析(ESI)，揭示了显著的化学多样性，其中数万个不同的质谱峰具有CHO、CHOS、CHNO和CHNOS元素组成(Schmitt-Kopplin等，2010)。然而，如果没有任何层析分离，就不能确定存在的单个化合物的详细化学结构。特别是元素组成为CH和CHN的有机化合物，尽管它们作为原始有机成分具有潜在的重要性，但由于CH和CHN化合物可能在母体水相蚀变过程中逃脱了化学氧化，因此没有对其进行研究。在这项研究中，我们对墨尔奇森陨石的极性溶剂提取物进行了高效液相色谱/高分辨质谱分析，以表征更原始的有机化合物。
Copyright © 2014 by The Geochemical Society of Japan. extract (Krishnamurthy et al., 1992). The heavy isotope enrichments suggest that the more primitive organic compounds may have originated partly from an interstellar environment. However, the less polar solvent extracts of CCs have rarely been studied, despite their relatively high content of organic compounds. Recently, ultrahighresolution mass spectral analysis on various solvent extracts of the Murchison meteorite (CM2) was performed by electrospray ionization (ESI) using Fourier transformion cyclotron resonance/mass spectrometry (FT-ICR/MS) to reveal significant chemical diversity with tens of thousands of different mass peaks having CHO, CHOS, CHNO and CHNOS elemental compositions (Schmitt-Kopplin et al., 2010). However, without any chromatographic separation, the detailed chemical structures of the individual compounds present cannot be determined. In particular, the organic compounds with their elemental compositions of CH and CHN were not investigated in spite of their potential importance as primitive organic components because the CH and CHN compounds may have escaped chemical oxidation during parent-body aqueous alteration. In this study, we performed high-performance liquid chromatography/high-resolution mass spectrometry (HPLC/HRMS) analysis of polar solvent extracts of the Murchison meteorite in order to characterize the more primitive organic compounds.