Caractérisation chimiques des écorces d'oranges, identification par GC-MS et évaluation du pouvoir antioxydant de leurs huiles essentielles

In this study we are interested in the recovery of some orange peel varieties from the region of Bejaia (Washington, Thomson, Double Fine, Portuguese, Jaffa, Sanguinelli and Bitter). Thus, we carried out a phytochemical study which enabled us to demonstrate the richness of the peel in bioactive compounds (terpenoids, sugars and mucilage). We also extract the essential oils from the fresh peel by steam distillation. The Jaffa variety is the richest in essential oils, with a yield of 1.48%. Thomson variety proved to be the lowest of essential oils with a yield of 0.39%. We tested radical scavenging activity of essential oils extracted from peels of the studied varieties. Double fine variety has the most interesting antioxidant activity (74.46%). The chromatographic analysis of Double fine essential oils by GC-MS identified ten components of which limonene is the major constituent (89.81%).