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Isolation of a Series of Fatty Acid Components of Ongokea Gore Seed (Isano) Oil and Their Detailed Structural Analysis

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Ntumba Kankolongo, Joséphine [UCL] Collard, Laurent [UCL] Taba, Kalulu [Université de Kinshasa] Robiette, Raphaël [UCL]

The total oil production capacity of isano oil is estimated at about 10,000 tons annually. Previous studies of this oil revealed that it is rich in fatty acids including a conjugated diyne moiety. This makes isano oil an excellent candidate for sustainable applications development. However, only a few of its fatty acids have been isolated and identified so far. In this study, we have reinvestigated this oil by characterizing its physicochemical properties and isolating several of its fatty acids as ethyl esters for their detailed structural analysis and identification. Six ethyl esters of fatty acids constituting isanic oil were isolated by flash column chromatography and semi-preparative HPLC. The detailed structural analysis of these fatty acid esters by IR, (HR)MS, and NMR (1D and 2D) allowed determining unequivocally their chemical structure. The main fatty acid component of the oil (35.7 %) was identified as isanic acid. Four minor acids were found to possess also two conjugated triple bonds while the sixth fatty acid does not contain carbon-carbon triple bonds nor double bonds but possess a cis epoxide function. Results obtained in this study are currently being used to explore potential applications of isano oil.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2015
Language Anglais
Journal information "Lipids" -
Peer reviewed yes
Publisher Springer ((Germany) Heidelberg)
issn 0024-4201
e-issn 1558-9307
Publication status Accepté/Sous presse
Affiliation UCL - SST/IMCN/MOST - Molecules, Solids and Reactivity
Keywords Ongokea gore ; seed oil ; fatty acids ; structural analysis
Links
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Bibliographic reference Ntumba Kankolongo, Joséphine ; Collard, Laurent ; Taba, Kalulu ; Robiette, Raphaël. Isolation of a Series of Fatty Acid Components of Ongokea Gore Seed (Isano) Oil and Their Detailed Structural Analysis. In: Lipids,
Permanent URL http://hdl.handle.net/2078.1/153458