Optimization of the TMAH Thermochemolysis Technique for the Detection of Trace Organic Matter on Mars by the SAM and MOMA-Pyr-GC-MS Experiment

Abstract : Boththe Sample Analysis at Mars (SAM) and Mars Organic Molecule Analyzer (MOMA)instrumentsare able to identify organic material at the Martian surface and subsurface. Both experiments are equipped with pyrolysis-Gas Chromatography-Mass Spectrometry (Pyr-GC-MS)and derivatization reagents (MTBSTFA)that will allowthe analyzerefractory com-pounds,making them more volatile and protecting the labile chemical groups. In order to improve the Pyr-GC-MS analysis, TMAH (tetramethylammonium hydrox-ide) will be used on MOMA and SAM to extract refrac-tory compounds (macromolecules, kerogen, etc.) and protect polar compounds released from the pyrolysis ex-periment.We performed pyrolysis and TMAH-thermochemolysis of a Martian regolith simulant (JSC-Mars-1) to optimizeanalytical parameters, especially the thermochemolysis temperature, to ensure the success of the near future in situthermochemolysis analyses on Mars.
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Contributor : Arnaud Buch <>
Submitted on : Thursday, June 14, 2018 - 11:18:34 AM
Last modification on : Friday, August 2, 2019 - 2:30:03 PM
Long-term archiving on : Monday, September 17, 2018 - 10:21:43 AM

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A. Buch, M. Morisson, Cyril Szopa, Maeva Millan, Caroline Freissinet, et al.. Optimization of the TMAH Thermochemolysis Technique for the Detection of Trace Organic Matter on Mars by the SAM and MOMA-Pyr-GC-MS Experiment. 49th LPSC Lunar and Planetary Science Conference 2018, Mar 2018, Houston, United States. ⟨hal-01815507⟩

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