Study on the Extraction of Polyphenols from Blueberry Leaves and their antioxidant properties

Blueberry leaf as materials, ethanol ultrasonic assisted extraction of blueberry polyphenols, concentration and solid-liquid ratio on time leaves influence the yield polyphenols were researched, orthogonal experiment to optimize technological conditions polyphenol was used. The results showed that optimal from follows, 9.06% with 4min time, 80% 1:45 (g/mL) ratio. Ultrasonic is a convenient high method, which suitable for leaves.