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Fatty Acids Profile of Alphitonia neocaledonica and Grevillea exul var. rubiginosa Seed Oils, Occurrence of an ω5 Series
Author(s) -
Bombarda I.,
Zongo C.,
McGill C. R.,
Doumenq P.,
Fogliani B.
Publication year - 2010
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/s11746-010-1581-2
Subject(s) - fatty acid , food science , gas chromatography , botany , chemistry , biology , organic chemistry , chromatography
This is the first report of the chemical composition of Alphitonia neocaledonica (AN) and Grevillea exul var. rubiginosa (GER) seed oils. Using retention indices and gas chromatography–mass spectrometry, an unusual family of unsaturated ω5‐fatty acids has been identified. These include 14:1, 16:1, 18:1 and 20:1. Identification of the unsaturated fatty acids was confirmed by formation of DMOX derivatives which gave characteristic and easily interpreted mass spectra. DMDS adducts were used to identify the positions of double bonds in the monounsaturated fatty acids. The major fatty acids were 16:1ω5 (45.6%) and 18:1ω9 (20.9%) for GER and 18:2 (23.6%) and 18:3 (20.4%) for AN. The total ω5‐monoenes were 63.4 and 21.5% for GER and AN, respectively. The seed oils of AN and GER can be considered as a good source of ω5‐monoenes, especially for GER. The occurrence of the ω5‐monoenes in Alphitonia neocaledonica can at present be considered as an exception within the Rhamnaceae family. Except for Ziziphus jujuba var. inermis , no species of this family has been described with a broad profile of ω5‐monoene fatty acids.