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Heat treatment of vegetable oils. II. GC‐MS and GC‐FTIR spectra of some isolated cyclic fatty acid monomers
Author(s) -
Sebedio J. L.,
Le Quere J. L.,
Semon E.,
Morin O.,
Prevost J.,
Grandgirard A.
Publication year - 1987
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02540791
Subject(s) - sunflower oil , chemistry , linseed oil , gas chromatography–mass spectrometry , monomer , fourier transform infrared spectroscopy , mass spectrometry , gas chromatography , chromatography , infrared spectroscopy , double bond , cis–trans isomerism , organic chemistry , polymer , food science , physics , quantum mechanics
Gas liquid chromatography coupled with mass spectrometry (GC‐MS) showed that the cyclic fatty acid monomers (CFAM) isolated from a heated linseed oil have two ethylenic bonds, while the CFAM isolated from heated sunflower oils were saturated and monoethylenic isomers. GC‐MS studies also showed the presence of cyclohexenic derivatives in the case of linseed oil. GLC coupled with Fourier transform infrared spectrometry (GC‐FTIR) studies indicated that the CFAM isolated from linseed oil were of cis (Z), trans (E) structures except two components which were cis,cis (Z,Z) dienoic acids. The unsaturated CFAM isolated from sunflower oils were cis (Z) and trans (E) monoethylenic isomers. For sunflower oils, the major CFAM were isomers having a cis (Z) ethylenic bond. The saturated CFAM isolated from a heated sunflower oil had molecular weights of 296 and 294. The latter could correspond to some bicyclic isomers.