Comparative Total Phenol Content and Antioxidant Activity of Different Solvent Extracts from Peanut Shell

In this study,ultrasonic-assisted extraction was used to extract bioactive components from peanut shells with water,60% ethanol or 60% ethanol combined with cellulase.The scavenging capacities of peanut shell extracts on DPPH and hydroxyl free radicals were evaluated.The contents of total phenol were determined.The results showed that the contents of total phenol in the extracts obtained using water,60% ethanol and 60% ethanol + cellulase were 81.22,205.9 mg/100 g and 370.8 mg/100 g,respectively.All three extracts had strong antioxidant capacity,especially the one obtained using 60% ethanol + cellulase.The scavenging rates of this extract on DPPH and hydroxyl free radicals were 88.49% and 93.65%,respectively.Therefore,the antioxidant capacity is positively correlated with the contents of total phenol in peanut shell extracts.