Optimization for Ultrasound Extraction of Polyphenol from Aronia Melanocarpa (Chokeberry) with Antioxidant Activity

Single-factor experiment and Box–Behnken design were applied to optimize the ultrasound-assisted extraction of chokeberry polyphenol. Under optimum conditions: ratio of liquid to raw material 39 mL/g, ethanol solvent concentration for extraction 56%, extraction temperature 46°C, extraction time 90 min, the chokeberry polyphenol yield was 1.95 ± 0.08%. The determination of DPPH, ABTS radical scavenging activity of chokeberry polyphenol exhibited the strongest antioxidant activity in vitro, and a concentration-dependent approach.