Laboratory Detection And Analysis Of Organic Compounds in Rocks Using HPLC and XRD Methods D. Dragoi, I.
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In this work we describe an analytical method for determining the presence of organic compounds in rocks, limestone, and other composite materials. Our preliminary laboratory experiments on different rocks/limestone show that the organic component in mineralogical matrices is a minor phase on order of hundreds of ppm and can be better detected using high precision liquid chromatography (HPLC). The matrix, which is the major phase, plays an important role in embedding and protecting the organic molecules from the harsh Martian environment. Some rocks bear significant amounts of amino acids therefore, it is possible to identify these phases using powder x-ray diffraction (XRD) by crystallizing the organic. The method of detection/analysis of organics, in particular amino acids, that have been associated with life will be shown in the next section.
[1] Stewart Sherrit,et al. Definitive mineralogical analysis of Martian rocks and soil using the Chemin XRD/XRF instrument , 2003 .
[2] J L Bada,et al. Amino acid racemization on Mars: implications for the preservation of biomolecules from an extinct martian biota. , 1995, Icarus.
[3] J. Bada,et al. Determination of alpha-dialkylamino acids and their enantiomers in geological samples by high-performance liquid chromatography after derivatization with a chiral adduct of o-phthaldialdehyde. , 1995, Journal of chromatography. A.