To establish the extraction method of berberine hydrochloride from coptis,To determine the content of berberine hydrochloride from different species of coptis and the same specie in different productive area of coptis.Develop a method of the highest extract rate,the extraction is the most efficient,and find a highest content specie of berberine hydrochloride of coptis to provide the quality basis for pharmaceutical preparation.Berberine hydrochloride from different species of coptis was determined by HPLC u...