本文提出等△A值—三波长分光光度法,应用电子计算机选择最适条件,减小了中药制剂分析中应用三波长分光光度法的难度。采用在10组适宜条件下选择222,232,249nm作为测定波长,测定芫花根注射液中二萜原酸酯类的含量(以芜花酯甲计算),平均回收率为99.7%,变异系数为1.7%(n=7)。 In this paper, the three-wavelength spectrophotometric method, such as △A value, is proposed, and the optimal conditions are selected by computer to reduce the difficulty of applying three-wavelength spectrophotometry in the analysis of traditional Chinese medicine preparations. The 222, 232, and 249 nm wavelengths were selected under the appropriate conditions in 10 groups to determine the content of diterpene esters in Radix Paeoniae Rubra Root Injection (calculated as Radix A). The average recovery was 99.7%, and the coefficient of variation was 1.7%. (n=7).