Optimizing β-CD Assisted Extraction of Total Flavonoids from Tea Dust

The β-CD assisted extraction was used to extract total flavonoids from by-products of tea dust-tea. Based on the single factor experiment, the effects of material-to-solvent ratio, β-CD content and extraction temperature on the extraction efficiency of total flavonoids were investigated with the Box-Behnken experiment and the response surface analysis. A quadratic polynomial model was established and verified. The optimal conditions of extracting total flavonoids were solid-to-solvent ratio of 1:61.83(g: m L), β-CD content of 8.27%, extraction temperature of 53℃. Under these conditions, the extraction efficiency of total flavonoids was 7.843%, close to the predicted value of 7.835%. Compared with the traditional boiling reflux method and ultrafine grinding extraction technology, the β-CD assisted extraction was efficient, environment friendly with high extraction rate.