OPTIMIZATION OF ULTRASOUND-ASSISTED EXTRACTION CONDITIONS OF FLAVONOIDS FROM TARTARY BUCKWHEAT

The objective of this study was to establish the optimum ultrasound-assisted extraction (UAE) conditions for flavonoids from tartary buckwheat (FTB). Single factor experiments were performed to determine the appropriate range of extraction conditions and orthogonal experiment were performed to obtain the optimum extraction conditions. The results showed that the optimum UAE conditions for FTB were as followings: ethanol concentration of 65%, solid:liquid ratio of 1:40 g/ml, extraction time of 35 min and extraction temperature of 65 °C. UAE method is an alternative extraction technique for fast extraction of FTB.