Premium
Linolenic acid artifacts from the deodorization of oils
Author(s) -
Ackman R. G.,
Hooper S. N.,
Hooper D. L.
Publication year - 1974
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/bf00000011
Subject(s) - chemistry , cis–trans isomerism , linoleic acid , gas chromatography , linolenic acid , fatty acid , chromatography , organic chemistry
Gas liquid chromatography on polar open tubular columns of the methyl esters of fatty acids from vegetable oils shows that the linolenic acid in deodorized oils is accompanied by two major artifacts identified as cis ‐9, cis ‐12, trans ‐15 and trans ‐9, cis ‐12, cis ‐15 isomers. Physicochemical studies, isolation, and partial degradation steps showed two additional isomers with trans ‐9, cis ‐12, trans ‐15 and cis ‐9, trans ‐12, cis ‐15 structures. Gas liquid chromatography also showed that linoleic acid was accompanied by the trans ‐9, cis ‐12 isomer. These artifacts were not present in unrefined oils or bleached oils but could be induced by deodorization in the laboratory. Proportions of the two major artifacts in total 18:3ω3 are given for some vegetable oils from the retail market.