应用一阶导数光谱法使扑热息痛与盐酸吗啉胍、扑尔敏以及感冒茶干浸膏的一阶导数光谱相互分开、互不干扰。样品可在不经分离的情况下,直接测定扑热息痛的含量。实验证明,不同浓度的扑热息痛在碱性条件下,在310nm和298nm波长之间的振幅值构成良好的线性关系。平均加样回收率在99.0～101.9％之间,CV小于2.7％。 The first-order derivative spectroscopy was used to separate paracetamol from the first derivative spectra of moroxydine hydrochloride, chlorpheniramine hydrochloride, and dry tea extract of the common cold, without disturbing each other. The sample can be used to directly determine the content of paracetamol without isolation. Experiments have shown that different concentrations of paracetamol under alkaline conditions, the amplitude of the wavelength between 310nm and 298nm constitute a good linear relationship. The average recovery was between 99.0 and 101.9%, and the CV was less than 2.7%.