Keywords Derivative spectrophotometry;Damping factor matrix method;Multicomponent analysis;Diphenhydraminc hydrochloride;Ephedrine hydrochloridc;Pentoxyverine citrate.;

• 导数分光光度法;阻尼因子矩阵法;多组分分析;盐酸苯海拉明;盐酸麻黄碱;咳必清;