Study on the Extracting technology of Ursolic Acid from Fructus Corni

Ursolic acid was extracted from Fructus Corni. The factors that influenced extraction technology were studied with quadratic orthogonal regression design taking the yield of ursolic acid as the index. The results showed that the optimized extraction technologies were: the ratio of liquid to solid was 5.01mL/g, the concentration of ethanol was 81.63%, the total extraction time was 1.203h and the extraction times were 3times. The extraction ratio was up to 3.13% under the op- timized techniques.