Optimization of the Extraction Technology of Senecio scandens by Orthogonal Design Combined with Informa- tion Entropy Weighting Method / 中国药房

ABSTRACT

OBJECTIVE：To optimize the extraction technology of Senecio scandens ，and to provide reference for the further development and utilization of the medicinal material. METHODS ：The method of reflux extraction with 80 ℃ water bath was used to extract S. scandens . HPLC method was adopted to determine the contents of chlorogenic acid and hyperoside. The determination was performed on Diamonsil C 18 with mobile phase consisted of 0.2％ glacial acetic acid water solution-methanol （82∶18，V/V）at the flow rate of 1.0 mL/min；the column temperature was set at 35 ℃；the detection wavelength was 327 nm，and the sample size was 5 μL. UV-Vis spectrophotometry was used to determine the contents of total flavonoids（by rutin ）and total alkaloids （by matrine）and the detection wavelengths were set at 509 nm and 208 nm，respectively. Based on single factor tests ，using ethanol volume fraction （A，％），solvent folds （B，mL/g），extraction time （C，h），extraction times （D，times）as factors ，using the contents of chlorogenic acid ，hyperoside，total flavonoids and total alkaloids as indexes ，and t he weight coefficients of above indicator components were calculated based on information entropy weighting method so as to calculate their comprehensive scores ， then L 9（34）orthogonal design was used to further optimize the extraction technology. The validation tests were also performed. RESULTS：The optimal extraction technology of S. scandens included that 8-fold 50％ ethanol，extracting for 3 times，lasting for 1.5 h each time. Results of 3 times of validation tests showed that RSDs of the contents of chlorogenic acid ，hyperoside，total flavonoids and total alkaloids were all lower than 1.5％（n＝3）. CONCLUSIONS ：The optimized technology is reproducible ， stable and feasible ，and can be used for the extraction of S. scandens .