Answers are grounded in this paper and cite their sources.
The analysis of the unsaponifiable fraction of several oil samples was performed by a new gas chromatographic technique with a polar column of high thermal stability. This column was adequate for fractionating sterols, methyl sterols and alcohols of the unsaponifiable matter, and allowed the detection of peaks usually unresolved with nonpolar columns.
No takes yet. Share an insight, caveat, or question.
Frega et al. (1992) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: