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The Research on Extraction of Flavonids from Eucommia Ulmoides Oliver Leaves

YE Wen feng, CHEN Xin, LIU Xiu juan, SUN Ling feng (Institute of Chemistry and Biology Science,Jiangxi Normal University,Nanchang 330027,China)  
The optimum extracting conditions of flavonoids from Eucommia ulmoides Oliver leaves were investigated by using the orthogonal design.The results showed that 80 ℃,10∶1 of 70% ethanol to Eucommia ulmoides Oliver leaves weight ratio,extraction for 3 times and 1.5 h for each time were optimal.The average yield is 1.976%.
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