Optimum technology for extracting flavonoids from tartary buckwheat bran and its mathematical model

In order to utilize efficiently buckwheat resource,the content of total flavonoids in tartary buckwheat bran was determined, and the extraction technology of total flavonoids from the bran and its mathematical model were analyzed. Results show that the content of total flavonoids is 6.01%. The optimum conditions are obtained as follows: the ethanol concentration is 80%,the temperature of extraction is 80℃, the ratio of material to solvent is 1∶50 and the time of extraction is 2.5 hours.With the technological conditions, the extraction rate is 94.01%. A mathematical model was established, according to the analysis of variance and the validation experiment. This model can be used to predict the experiment results.