关键词: microwave-assisted extraction;Ciwujia;uniform design;saponins;isofraxidin

Abstract: Microwave-assisted extraction (MAE) for active ingredients in Ciwujia was studied by using
ethanol as the extractant. Comparing MAE with conventional methods, the former can save the
extracting time and increase the content of the active ingredients in product. As to the
operation in MAE, the continuous radiation process is more convenient for the extraction
for traditional Chinese medicine than the intermittent radiation process. Optimized by
uniform design, MAE was proved to be an effective and novel process for extracting active
ingredients in Ciwujia. The optimized MAE conditions are as follows: the microwave power is
510 W, the radiation time 30 min, the alcohol concentration at 80%, the ratio of solvent to
solid material being 5:1, the soaking time 0.5h, and the herbal particle size is (520 ±
19)μm.

Key words: microwave-assisted extraction, Ciwujia, uniform design, saponins, isofraxidin