Study on conditions of anthocyanins from blueberry pomace by ultrasonic-assisted extraction

The blueberry pomace was analyzed as the material to study the conditions of anthocyanins by ultrasonic-assisted extraction. Results showed that optimum extraction conditions were as follows:ultrasonic power 350W, extraction temperature 45℃, extraction time 50min, solid-liquid ratio 1∶55g/mL, ethanol (pH=1.5) volume fraction 60%, extraction 2 times. Under this conditions, (9.91 ±0.05) mg anthocyanins were extracted from one gram blueberry pomace. The method was time-saving and high extraction yield compared with acidethanol extraction.