百喘朋片为止咳平喘药,北方各地方标准均有收载。因分别测定盐酸麻黄碱和盐酸苯海拉明的含量较困难,多只测量总氯量。虽然也有单独测定盐酸麻黄碱或盐酸苯海拉明的方法,但方法繁琐。本文采用酰化,使仲胺失去碱性, Baichuanpeng tablets cough and asthma medicine, the northern part of the local standards are included. Because of the determination of ephedrine hydrochloride and diphenhydramine hydrochloride content is more difficult, more than the total measurement of total chlorine. Although there is also a separate determination of ephedrine hydrochloride or diphenhydramine hydrochloride method, but the method cumbersome. In this paper, acylation, the secondary amine loses its basicity,