Experimental methods to extract biomarkers Source rock ↓ Extracting the kerogen and bitumen ↓ Silica column fractionation ↓ Aromatic and Saturated fractions Aromatic and Saturated fractions ↓ Gas chromatography-mass spectrometry mass spectrometry (GCMSMS) ↓ Agilent Mass Hunter ↓ Biomarker for Environmental Indicator >>Biomarker classification >>>Lipids >>>>Acetogenic lipids >>>>Isoprenoids >>>>Acyclic and cyclic isoprenoids >>>>Polycyclic isoprenoids >>>>Hopanoids >>>>Steroids >>>>Carotenoids >>>>Squalene >>>Kerogen >>>Diagenesis and catagenesis >>Biomarker as Source Indicator >＞>Steranes, hopanes etc >＞>Hydrocarbons >＞>Environmental Indicators ＞＞>Indicators of Euxinia ＞＞Experimental methods to extract biomarkers >>>Source rock >>>Extraction >>>Fractionation >>>GCMS
