Crude Oil Hydrocarbon Group Separation Quantitation

Model molecules mimicking asphaltenes

“…Instead, hydrocarbon group type analysis is commonly employed [38][39][40][41][42][43][44][45][46] . The traditional SARA-separation is an example of such group type analysis, separating the crude oils in four main chemical classes based on differences in solubility and polarity.…”

Rapid sequential separation of sedimentary lipid biomarkers via selective accelerated solvent extraction

“…For this (Fig. 1), a saturated hydrocarbon fraction (FSAT) was eluted with hexane (ε 0 0.01) because of its overall low retention on activated Si-gel (k < 0.15; Radke et al, 1980;Dark, 1982) with this solvent.…”

The Column in Liquid Chromatography

“…Rapid equilibration with the mobile phase allows the use of gradient elution. The 3-aminopropysiloxane bonded phase has been used for the class fractionation of polycyclic aromatic hydrocarbons and their alkylated analogs into groups containing the same number of rings [262,263]. The surface of the chemically bonded phases is heterogeneous with unreacted silanol groups contributing to retention.…”