The Critical Idiom

Liquid chromatography/field ionization mass spectrometry in the analysis of high-boiling and nondistillable coal liquids for hydrocarbons

“…Elution profiles for acyclic and cyclic alkanes, and monoaromatics on semipreparative pBondapak NH2 column with n-heptane as a mobile phase at 0.8 mL/mln, refractive index detector. Key: (1) n-C14H30, n-C16H34, n-C13H38, and n-C44Hgo, (2) cyclohexane, (3) perhydro-/3-carotene, (4) decalin, (5) perhydrofluorene, (6) cholestane, (7) perhydropyrene, (8) a mixture of pentacyclic alkanes, (9) namylbenzene, (10) benzene, (11) tetralin, (12) dodecahydrotrlphenylene.…”

“…The separation of the PAH portion of high-boiling and nondistillable coal liquids is a difficult task. Methods developed in the past for the separation of hydrocarbons in high-boiling petroleum distillates are only capable of separating mixtures into saturates, mono-, di-, and tricyclic aromatics (10)(11)(12)(13).…”