title: Thermal stability and long-chain fatty acid positional distribution on glycerol of argan oil.
abstract: The primary aim of this study was to determine the oxidative stability of argan oils by using peroxides and conjugated diene hydroperoxides measurements as analytical indicators. Both food and cosmetic argan oils were investigated. Their oxidative stability was also determined by monitoring the relative changes of their fatty acid profiles by (1)H NMR. In addition, valuable information regarding minor components as well as the acyl positional distribution, were obtained for both grades by high field (1)H and (13)C NMR, respectively. Given that the cosmetic and food grades have a similar profile and content of phenolic antioxidants, vitamers, and squalene, it appears that the ratio of fatty acid aliphatic to bisallylic CH2 groups, much higher in argan oils than in other vegetable oils, is responsible for their higher thermal stability.
authors.affiliation: Division of Toxicology and Cancer Risk Factors, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany. Electronic address: Khallouki.Farid@claudiusregaud.fr.
authors.forename: Farid
authors.initials: F
authors.lastname: Khallouki
authors.affiliation: Università degli Studi del Molise, Dip. STAAM, I-86100 Campobasso, Italy; CNR, Istituto di Metodologie Chimiche, I-00016 Monterotondo Scalo, Italy.
authors.forename: Luisa
authors.initials: L
authors.lastname: Mannina
authors.affiliation: Aix-Marseille Université, ISM2-UMR-6263, Centre de Saint Jérôme, Avenue Escadrille Normandie Niémen, Case 512, F-13397 Marseille cedex 20, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Viel
authors.affiliation: Division of Toxicology and Cancer Risk Factors, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany.
authors.forename: Robert W
authors.initials: RW
authors.lastname: Owen
keywords: (1)H and (13)C NMR; Argan oil; High field; Regiospecificity; Thermal stability