Optimization of Extraction Process for Active Ingredients in Seeds of Sophora alopecuroides by Plackett-Burman Design and Response Surface Analysis / 中国药学杂志

ABSTRACT

OBJECTIVE: To optimize extraction process for active ingredients in seeds of Sophora alopecuroides, to provide a reference for scale production. METHODS: Active ingredients from Sophora alopecuroides were extracted by ethanol, with average yield of oxysophocarpine and oxymatrine as index, some factors affecting index were firstly evaluated by Plackett-Burman design, then taking oxysophocarpine and oxymatrine as indexes respectively, extraction conditions were optimized by Box-Behnken design, experimental data was fitted by multiple linear regression and binomial formula fitting, extraction process was optimized by response surface method, and prediction was carried out through comparing the observed and predicted value. RESULTS: Extracting times, crushing degree and solvent times had significant effects on yields of oxysophocarpine and oxymatrine; binomial equation fitted well with good predictability. optimum extraction technology of Sophora alopecuroides was as followingcrushed through 65 mesh sieve, extracted 4 times with 12-fold the amount of 60% ethanol for 2 h each time; yield of oxysophocarpine and oxymatrine was 92.3%, 78.6% respectively, both deviations were small by comparing with the predicted value. CONCLUSION: This extraction process is reasonable and feasible by Plackett-Burman design and response surface analysis with good predictability. This study can provide experimental basis for further scale production of Sophora alopecuroides.