Study on comprehensive extraction of tea polyphenol and tea saponin from tea flowers

In order to accomplish the comprehensive utilization of tea trees,tea flowers were selected as material,the orthogonal experiments was conducted to optimize the technological parameters of the comprehensive extraction of polyphenols and tea saponins from tea flowers,based on the single factor experiments.By means of orthogonal test,the effects of extracting factors including extraction time,ratio of solid to solution,extraction temperature,ethanol concentration and ultrasonic power were investigated.The results showed that the optimum factors affecting extraction yields of tea polyphenol and tea saponin were as follows:70% ethanol concentration,350W ultrasonic power,60℃ extraction temperature,1∶30g/mL ratio of solid to solution for 10min extraction time.Under the above mentioned conditions,the highest extraction rate was obtained,the yields of tea polyphenol and tea saponin was up to 28.38% and 23.69%.