Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications
Using portable Raman spectrometers for the identification of organic compounds at low temperatures and high altitudes: exobiological applications
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DOI：
10.1098/rsta.2010.0075
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发表时间：
2010-07-13
期刊：
影响因子：
5
通讯作者：
Culka, A.
中科院分区：
文献类型：
--
作者：
Jehlicka, J.;Edwards, H. G. M.;Culka, A.
有机矿物、有机酸和含氨有机分子是天体生物学研究的重要靶分子。在这里，我们提出的便携式手持拉曼光谱仪，以检测这些有机化合物在野外条件下的评价结果。这些测量是在2009年2月至3月的冬季期间在奥地利阿尔卑斯地区进行的，温度范围在-5至-25摄氏度之间。研究的化合物进行检测，在现场条件下，其主要的拉曼光谱特征，观察明确无误地在其正确的参考波数位置。结果表明，小型化拉曼光谱仪具有785 nm激发波长的优势，可作为研究野外低温条件下有机矿物、有机酸和含氮有机化合物的关键仪器。在欧空局和美国航天局为侧重于火星、土卫六、木卫二和其他地外天体的若干飞行任务设计的有效载荷中，可以建议将拉曼光谱学作为一种重要的非破坏性分析工具，用于现场识别与行星和月球表面或近地表下的生命探测有关的有机化合物。
Organic minerals, organic acids and NH-containing organic molecules represent important target molecules for astrobiology. Here, we present the results of the evaluation of a portable hand-held Raman spectrometer to detect these organic compounds outdoors under field conditions. These measurements were carried out during the February-March 2009 winter period in Austrian Alpine sites at temperatures ranging between -5 and -25 degrees C. The compounds investigated were detected under field conditions and their main Raman spectral features were observed unambiguously at their correct reference wavenumber positions. The results obtained demonstrate that a miniaturized Raman spectrometer equipped with 785 nm excitation could be applied with advantage as a key instrument for investigating the presence of organic minerals, organic acids and nitrogen-containing organic compounds outdoors under terrestrial low-temperature conditions. Within the payload designed by ESA and NASA for several missions focusing on Mars, Titan, Europa and other extraterrestrial bodies, Raman spectroscopy can be proposed as an important non-destructive analytical tool for the in situ identification of organic compounds relevant to life detection on planetary and moon surfaces or near subsurfaces.