Ripe pineapples were cut into pieces and washed with deionised water. The small pieces were homogenised in a grinder for 3 min to 40-mesh size paste. Twenty five grams of paste samples was extracted with 150 mL of ethyl acetate by mixing, using a magnetic stirrer at 30 °C for 2 h. The extract was filtered through Whatman No. 41 filter paper to obtain particle free extract. The residue was reextracted twice and filtered. The extracts were pooled and concentrated and
dried under vacuum. The same procedure was followed for the other solvents such as methanol and water for antioxidant fractions (Jena et al., 2002) and the extracts were used to explore their antioxidant activity.