Heat treatment of vegetable oils. II. GC‐MS and GC‐FTIR spectra of some isolated cyclic fatty acid monomers

• Published in: Journal of the American Oil Chemists' Society Vol. 64; no. 9; pp. 1324 - 1333
• Main Authors: Sebedio, J. L., Le Quere, J. L., Semon, E., Morin, O., Prevost, J., Grandgirard, A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.09.1987; Springer
• Subjects: Applied sciences; Biological and medical sciences; Chemical industry and chemicals; Composition, physical and chemical properties; Exact sciences and technology; Fat industries; Food industries; Fundamental and applied biological sciences. Psychology; Oils and fats; Vegetable fat; Sunflower oil; Cyclic compound; Reaction product; Linseed oil; Fatty acids; Thermal degradation; Heat treatment; Vegetal oil; Structure; Isomerization
• ISSN: 0003-021X; 1558-9331
• DOI: 10.1007/BF02540791

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 ofcis (Z),trans (E) structures except two components which werecis,cis (Z,Z) dienoic acids. The unsaturated CFAM isolated from sunflower oils werecis (Z) andtrans (E) monoethylenic isomers. For sunflower oils, the major CFAM were isomers having acis (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.