Effect of extraction solvents on phenolic content and antioxidant activities of Indian gooseberry and guava

Solvents of various concentrations (50%, 70% and 100%) of ethanol, methanol, acetone and water were explored for the maximum extraction of antioxidants from Indian gooseberry and guava. The extracts were screened for their total phenolic compounds, reducing power, percent free radical scavenging activity and flavonoid content. 50% ethanol was found as best extracting solvent for extraction of phenolics and antioxidants for both the fruits. In Indian gooseberry and guava, 72.45 and 33.29 GAE mg/g total phenolics, 96.79 and 42.95 mM Fe (II)/g FRAP values were obtained respectively. It was observed that the flavonoid content of various Indian gooseberry extracts varied between 0.71 to 10.34 QE mg/g and for guava 2.03 to 16.34 QE mg/g which reveals that guava contains higher amount of flavonoids as compared to Indian gooseberry extracts. Percent free radical scavenging activity of Indian gooseberry and guava extracts in various solvents also showed the similar trend. Percent free radical scavenging activity of Indian gooseberry and guava ranged from 13.64% to 83.14% and 12.24 to 74.18% respectively, with maximum values in 50% ethanol (C) All Rights Reserved