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Detection of cis ‐vaccenic acid in palm oil by 13 C NMR spectroscopy
Author(s) -
Ng Soon,
Koh Heng Fui
Publication year - 1988
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02535295
Subject(s) - chemistry , vaccenic acid , palm oil , nuclear magnetic resonance spectroscopy , fatty acid , organic chemistry , carbon 13 nmr , spectroscopy , food science , linoleic acid , physics , conjugated linoleic acid , quantum mechanics
The NMR signals of the carbonyl and olefinic carbons of the oils of some species of palm show some relatively weak peaks at characteristic positions that have not been identified previously. These peaks are most intense in the oil of the species Elaeis oleifera . On the basis of the chemical shift data of the carbonyl and olefinic carbons of several synthetic monoenic triacylglycerols and of the packed‐column gas chromatogram of the methyl esters of the oil of E. oleifera , the peaks in question are assigned to cis ‐vaccenic acid (18∶1,[ cis ]‐11). 13 C NMR spectroscopy is an effective technique for the detection of cis ‐vaccenic acid and other monounsaturated fatty acids in vegetable oils or fats.