Experimental Studies On Qingying Tea Formula By Semi-Bionic Extraction

Objective: Optimizing the technological condition for extraction method of Qingying tea. Method: Take the panoxadiol, panoxatriol, chrysophanol, polysaccharide and dry extractas the indexes to optimize the extraction technology according to the theory of Semi-Biotic Extraction(SBE) by the method of even design, the drug combination by SBE method, the alcohol precipitation concentration, and finally compare the methods of SBE, Semi-Biotic Extraction and Alcohol precipitation(SBAE), Water Extraction(WE), Water Extraction and Alcohol precipitation(WAE).Result: The optimized pH values of the water used in decoctions by SBE method are 2.0,7.5,8.5 respectively; the time of each decoction is 200min, lOOmin, 50min; the better combination of drugs is to decoct them separately; the best alcohol precipitation concentration is 70%. The sequence of total index value is: SBE> WE > SBAE >WAE. Conclusion: The SBE method is the best extraction method in preparation of Qingying tea.