Optimization of ethanol extraction technique for Schisandrae Fructus and Salviae Miltiorrhizae Radix by multi index comprehensive weighted score evaluation / 中草药

ABSTRACT

Objective: To optimaize the ethanol extraction technique for Schisandrae Fructus and Salviae Miltiorrhizae Radix and confirm the optimum extraction process parameters by multi index comprehensive weighted score evaluation. Methods: Alone and mixed extraction was carried out by using 90%, 70%, and 50% ethanol relux extraction. Orthogonal test method was uesd to optimize the process with ethanol concentration, solvent ratio, extraction time, and extraction times as detecting factors and schisandrin, schisantherrin A, deoxyschisandrin, schisandrin B, Tanshinone IIA, and salvianolic acid B as examining indexes, the detection was carried out by HPLC and DAD detector. The data were analyzed by multi index comprehensive weighted score evaluation. Results: The effective composition contents of mixed extract from Schisandrae Fructus and Salviae Miltiorrhizae Radix were more than alone extracting. The best extraction conditions were solvent ratio of 18 with 90% ethanol reflux extraction for three times, and 1.5 h each time. Conclusion: The mixed extracting is simple and appropriate, the extraction yield of active ingredients by mixed extracting is more than alone extracting. Different materials with different wavelength can effectively eliminate the interference at the same time, the accuracy is higher.