差示分光光度法同时测定药物中的PPA和扑尔敏

Determination of PPA and pyrilamine by difference spectrophotometry at the same time

用差示分光光度法同时测定旧康泰克胶囊中扑尔敏和盐酸苯丙醇胺(PPA)含量.扑尔敏检测波长273 nm,0.01～0.07 mg/mL范围内线性关系良好(r=0.9996),平均回收率100.15%,RSD=2.28%;PPA检测波长240 nm,其工作曲线在0.01～0.06 mg/mL范围内成线性关系(r=0.9993),平均回收率96.11%,RSD=2.13%.