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Percentages of compounds observed only by GC (GC only, red), common between both analysis (blue), and seen by infusion only (black) in the m/z 100–450 range, compared to the total number of identifications, as a function of the heteroatom class in (a) petroleum crude oil (PCO), (b) organics in shale oil (OSO), and (c) heavy sweet oil (HSO).
