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Flavonoid profile and radical-scavenging activity of Mediterranean sweet lemon (Citrus limetta Risso) juice
Davide Barreca1, Ersilia Bellocco1, Corrado Caristi1
1Dipartimento di Chimica Organica e Biologica, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy.
Abstract:
The flavonoid composition of crude Citrus limetta Risso (limetta, Mediterranean sweet lemon) juice was elucidated by means of reverse-phase HPLC-DAD-ESI-MS/MS analysis. In a single course, eight compounds (C- and O-glycosyl flavonoids) were identified, six of which were found for the first time in limetta juice: four C-glucosyl flavones, namely vicenin-2, lucenin-2 4'-methyl ether, orientin 4'-methyl ether and scoparin; the O-glycosyl flavone, rhoifolin; and the O-glycosyl flavanone, eriocitrin. In addition, ABTS+ and DPPH radical quenching and FRAP assays demonstrate that limetta juice possesses remarkable antioxidant activity.
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