Ability of surface-active antioxidants to inhibit lipid oxidation in oil-in-water emulsion

Yuji Hiromi, Weiss Jochen, Villeneuve Pierre, Lopez Giraldo Luis Javier, Figueroa-Espinoza Maria-Cruz, Decker Eric Andrew. 2007. Ability of surface-active antioxidants to inhibit lipid oxidation in oil-in-water emulsion. Journal of Agricultural and Food Chemistry, 55 : 11052-11056.

https://doi.org/10.1021/jf072586f

Article de revue ; Article de revue à facteur d'impact

Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
document_542248.pdf
Télécharger (347kB)

Résumé : Lipid oxidation in dispersed lipids is prevalent at the oil-water interface where lipid hydroperoxides are decomposed into free radicals by transition metals. Free radical scavenging antioxidants are believed to be most effective in lipid dispersions when they accumulate at the oil-water interface. The surface activity of antioxidants could be increased by their conjugation to hydrocarbon chains. In this study, [rô]-hydroxyphenylacetic acid (HPA) was conjugated with either a butyl or dodecyl group. The HPA conjugates were more effective at decreasing interfacial tension than unconjugated HPA, indicating that they were able to adsorb at lipid-water interfaces. However, free HPA was a more effective antioxidant than butyl and dodecyl conjugates in Menhaden oil-in-water emulsions as determined by both lipid hydroperoxides and thiobarbituric acid reactive substances. The increased antioxidant activity of free HPA could be due to its more effective free radcial scavenging activity and its higher concentration in the lipid phase of oil-in-water emulsions in the presence of surfactant micelles where it can act as a chain-breaking antioxidant.

Mots-clés Agrovoc : oxydation, antioxydant, émulsion, lipide, radical libre, réaction chimique

Classification Agris : Q02 - Traitement et conservation des produits alimentaires

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations