摘要：Glyceryl guaiacol ether, noscapine, noscapine hydrochloride, chlorpheniramine maleate, diphenhydramine salicylate, diphenhydramine hydrochloride, promethazine methylenedisalicylate, alimemazine tartrate, and isothipendyl hydrochloride in anti-cold preparations were separated successfully, using styrene-divinylbenzene copolymer gel or poly (methyl methacrylate) gel as a stationary phase and a mixture of methanol and concentrated ammonia water as a mobile phase. The separated ingredients were detected by spectrophotometry using an ultraviolet monitor. Methylephedrine hydrochloride was undetected by this method because of its low sensitivity. It must be separated from other ingredients by an ion-exchanger. The separated methylephedrine was oxidized with potassium ferricyanide, chromatographed, and quantitated by substituting methanol for the mixture of methanol and concentrated ammonia water in this procedure.
关键词：high-speed liquid chromatography;antitussives;expectorants;antihistamic agents;copolymer of stylene-divinylbenzene gel;poly (methyl methacrylate) gel;oxidation of methylephedrine
