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

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 Chil...

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Published in:Planetary and space science 2006-12, Vol.54 (15), p.1592-1599
Main Authors: Buch, A., Glavin, D.P., Sternberg, R., Szopa, C., Rodier, C., Navarro-González, R., Raulin, F., Cabane, M., Mahaffy, P.R.
Format: Article
Language:English
Subjects:
Amino acids
Atacama
Carboxylic acids
Derivatization
Extraction solid–liquid
GC-MS
Isopropanol
Mars
Sciences of the Universe
Ultrasound
Water
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cited_by cdi_FETCH-LOGICAL-c362t-aff80b20ed96c78c1442bb27224a5d798806ae999f95e9975a2e2c087c7d7f93
cites cdi_FETCH-LOGICAL-c362t-aff80b20ed96c78c1442bb27224a5d798806ae999f95e9975a2e2c087c7d7f93
container_end_page 1599
container_issue 15
container_start_page 1592
container_title Planetary and space science
container_volume 54
creator Buch, A.
Glavin, D.P.
Sternberg, R.
Szopa, C.
Rodier, C.
Navarro-González, R.
Raulin, F.
Cabane, M.
Mahaffy, P.R.
description 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.
doi_str_mv 10.1016/j.pss.2006.05.041
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source ScienceDirect Freedom Collection
subjects Amino acids
Atacama
Carboxylic acids
Derivatization
Extraction solid–liquid
GC-MS
Isopropanol
Mars
Sciences of the Universe
Ultrasound
Water
title A new extraction technique for in situ analyses of amino and carboxylic acids on Mars by gas chromatography mass spectrometry
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