Chromatographic analysis of phospholipid and cholesterol oxidation.

Capillary thin layer and gas chromatographic methods for analysis of the extent of oxidation in phosphatidyl choline/cholesterol samples are described. Examples of systems suitable for qualitative and quantitative analysis, based on use of unmodified samples or of their derivatives, are illustrated. A method for concurrent quantitative determination of phospholipid and sterol without preseparation is introduced and is based on extension of a previous lipid trans-methylation technique.