Figure F2. Ion chromatograms illustrating the similarity in carbon number distribution between the steranes (m/z 217) present in bitumen (Site C0014) and sterenes (m/z 215) from Site C0017. Carbon numbers are noted. Δ4 = ster-4-ene; Δ5 = ster-5-ene; ααα R = 5α,14α,17α(H)20(R) steranes; ααα S = 5α,14α,17α(S) steranes.
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