A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry. - Archive ouverte HAL Access content directly
Journal Articles Planetary and Space Science Year : 2006

A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry.

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Abstract

In order to target key organic compounds in the Martian regolith using gas chromatography mass spectrometry (GC-MS), we have developed a new extraction procedure coupled with chemical derivatization. This new technique was tested on a Mars analog soil sample collected from the Atacama Desert in Chile. We found that amino and carboxylic acids can be extracted from the Atacama soil in a 1:1 mixture of isopropanol and water after ultrasonic treatment for 30 min. The extracted organic compounds were then derivatized in a single-step reaction using N-methyl-N-(tert-butyldimethylsilyl)-trifluoroacetamide (MTBSTFA) as the silylating agent in order to transform these compounds into volatile species that can then be detected by GC-MS. We are currently developing a miniaturized reaction cell suited for spaceflight, where both organic extraction and chemical derivatization processes can take place in a single step.

Dates and versions

hal-00133424 , version 1 (26-02-2007)

Identifiers

Cite

Arnaud Buch, Daniel P. Glavin, R. Sternberg, Cyril Szopa, C. Rodier, et al.. A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry.. Planetary and Space Science, 2006, 54, pp.1592-1599. ⟨10.1016/j.pss.2006.05.041⟩. ⟨hal-00133424⟩
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