Study on extraction technology of total flavonoids in tartary buckwheat bran using response surface methodology

In this paper,the content of total flavonoids in tartary buckwheat bran was determined,the extraction technology of total flavonoids in the bran by microwave was studied,and all experiments were designed and optimized with Box-Behnken concept of response surface methodology(RSM).The results showed that the content of total flavonoids was 60.1 g/kg;The regression equation(model) for the extraction technology was established,and also verified with the check experiments.The optimum conditions of the extraction technology were obtained as follows:treatment time 120 s,the concentration of ethanol 86%,the ratio of material to solvent 1∶50.Using the technological conditions,the extraction yield of total flavonoids was 58.1 g/kg,and the extraction rate was 96.67%.