GC-MS on the Viking 1976 Mars missions did not detect organic molecules on …

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- The missing organic molecules on Mars

Table 1.   Expected Metastable Products from Organic Substances in the Murchison meteorite5,6   Substance Concentration (parts per million) Metastable Products Acid insoluble kerogen 14500 Benzenecarboxylic acids Aliphatic hydrocarbons 12-35 Acetate Aromatic hydrocarbons 15-28 Benzenecarboxylic acids Monocarboxylic acids  330 Acetate/oxalate 2-Hydroxycarboxylic acids 14.6 Acetate/carbonate Alcohols (primary) 11 Acetate Aldehydes 11 Acetate Ketones 16 Acetate, benzenecarboxylic acids Amines 10.7 Acetate Urea 25 Carbonate Heterocycles 12 Carbonate, other products

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Source: Proc. Natl. Acad. Sci. USA Vol. 97, Issue 6, 2425-2430, March 14, 2000