Extraction of Polyphenol, Flavonoid from Emblica officinalis, Citrus limon, Cucumis sativus and Evaluation of their Antioxidant Activity

The antioxidant potential of three commonly used edible fruits and vegetables Emblica officinalis (Amla), Citrus limon (lemon) and Cucumis sativus (cucumber) available in local market of Jaipur (India), was estimated. The parts of food material taken for this study is edible part of Emblica officinalis, peel of Citrus limon and Cucumis sativus. The total phenolic content, antoxidant activity and flavonoid content was estimated by folin-ciocalteau method, phosphomolybdenum assay and aluminium chloride colorimetric technique. All the three activities determined were found maximum in Emblica officinalis, but Citrus limon and Cucumis sativus also show good amount of these activities. Thus the study revealed that the peel of Citrus limon and Cucumis sativus (otherwise waste) can also be used as a good source of antioxidant activity.