Essential oils content and antioxidant properties of peel ethanol extract in 18 lemon cultivars
2010
Di Vaio, C. | Graziani, G. | Gaspari, A. | Scaglione, G. | Nocerino, S. | Ritieni, A.
Composition of essential oils and antioxidant activity of peel ethanol extract were analyzed in 18 local lemon cultivars. Essential oils composition was determined by GC/FID analysis, and antioxidant activity with the ABTS method. Fruit weight, polar and equatorial diameters, peel thickness, seed number, juice percentage, titratable acidity and juice pH were also determined for each cultivar. The main component in the peel essential oil was limonene, accounting for 72.5-76.4%, followed by β-pinene (11.6-18.7%). Several other monoterpene hydrocarbons were also identified at appreciable contents, namely terpinene (2.88-8.26%), α-pinene (1.4-1.5%) and myrcene (0.95-1.12%). No clear relationship could be shown between the antioxidant activity and the essential oil composition of the extracts. In this study, cultivars with higher essential oil content and antioxidant activity were identified. Data were subjected to analysis of variance using ANOVA and means were compared by the Duncan test.
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