Optimization of the TMAH Thermochemolysis Technique for the Detection of Trace Organic Matter on Mars by the SAM and MOMA-Pyr-GC-MS Experiment
2018
Boththe
Sample Analysisat
Mars(SAM) and Mars Organic Molecule Analyzer (MOMA)instrumentsare able to identify organic material at the
Martian surfaceand 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
pyrolysisex-periment.We performed
pyrolysisand 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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