The stereospecific distribution of major fatty acids between the 1,3‐and 2‐positions of glycerol in oil samples obtained from the same olive cultivar Leccino, grown in different Italian regions, was studied by 13C‐NMR‐spectroscopy. By this method, the saturated acids were found to be confined to 1,3‐positions. Oleic and linoleic acids had common patterns of positional specificities, mostly in 2‐position being that of the diunsaturated acid. The results obtained from the present study confirm that 13C‐NMR represents a suitable method to perform the stereospecific analysis of olive oil sn‐triglycerides. This paper reports on preliminary results of a research project aimed at defining a chemical basis for a varietal and geographical classification of olive oils.
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Vlahov et al. (1996) studied this question.
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