title: [Determination of berberine in xianglian wan and zuojin wan using first derivative spectrometry].
authors.forename: Y Z
authors.initials: YZ
authors.lastname: Wang
mesh_terms: D001599:Berberine / Q000032:analysis*; D001600:Berberine Alkaloids / Q000032:analysis*; D004365:Drugs, Chinese Herbal / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
chemical_list: D001600:Berberine Alkaloids; D004365:Drugs, Chinese Herbal; D001599:Berberine