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. 2019 Nov 18;116(49):24440–24445. doi: 10.1073/pnas.1907169116

Fig. 3.

Fig. 3.

Gas chromatography/combustion/isotope ratio mass spectrometry (GC/c/irMS) and GC/MS chromatograms of a derivatized NWM801 extract with an internal standard and the Murchison extract. (A) Single ion chromatogram (m/z = 44) of GC/c/irMS of the NWA 801 extract. (B) Single ion chromatogram (m/z = 44) of GC/c/irMS of the Murchison extract. (C) Signal ratio chromatogram of m/z = 45 over m/z = 44 of the NWA 801 extract. (D) Signal ratio chromatogram of m/z = 45 over m/z = 44 of the Murchison extract.