Abstract
In this paper, the extraction of berberine from Phellodendri Cortex was studied. The barks were cut to various sizes (1-1), treated with ether prior to extraction, or untreated, and then, were extracted in water or in methanol. As the result of analysis of extraction rate, the mechanism of extraction consists of washing, diffusional and capillary extraction in both cases of water and methanol, and in the latter case, the capillary extraction has a rather little effect on total extraction. The treatment with ether has little effect on extraction, the choice of solvents is the main factor.
