Study on Aqueous Two-Phase Extraction of Teapolypheols from in Green Tea

Tea polyphenols are the general name of polyphenols in tea, which are widely used in food, oil, health care, medicine, daily chemical, fine chemical and other fields. In this paper, ethanol / ammonium sulfate aqueous two-phase extraction of tea polyphenols as the main research object, by changing the single factor method, the distribution coefficient, extraction rate, yield of tea polyphenols in tea were studied. The purpose is to explore the effects of C2H5OH dosage, (NH4) 2SO4 dosage, salt dosage, extraction temperature, extraction time on the content of tea polyphenols, The results showed that the optimal distribution system was as follows: C2H5OH dosage 4.5mL, (NH4) 2SO4 dosage 2.9g, salt dosage 0.05g, water bath temperature 40°C, extraction time 20min, the extraction rate was 4.30%, and the yield was 98.80%. A new method for extracting tea polyphenols from tea was established.