METHOD OF PLANT POLYPHENOL EXTRACT PREPARING

摘要

FIELD: chemical-pharmaceutical industry. SUBSTANCE: invention relates to a method of preparing the plant polyphenol extract showing an antioxidant activity. The raw source are hardwood sprouts and/or bark of Far Eastern bush clover (Lespedeza bicolor). Raw is stored in winter period. Extraction is carried out with an organic solvent three-fold at 40-60 C at ratio raw : solvent = = 1:(5-10). Then the combined extracts are evaporated and a residue is dried under vacuum. EFFECT: antioxidant activity of the end product. 1 tbl, 2 ex