本文应用适应卡尔曼滤波分光光度法同时测定了复方扑热息痛注射液各组分的含量,扑热息痛、安替比林的平均回收率分别为100.4%和100.2%,变异系数分别为0.72%和1.28%,结果优于常规卡尔曼滤波法。适应卡尔曼滤波法为相互干扰的多组分体系直接测定提供了一种新的方法。 In this paper, the content of paracetamol injection was determined by using adaptive Kalman filter spectrophotometry. The average recoveries of paracetamol and antipyrine were 100.4% and 100.2%, respectively, and the coefficients of variation were 0.72% and 1.28% respectively. The result is better than the conventional Kalman filter. Adaptation to Kalman filter provides a new method for the direct determination of multi-component systems with mutual interference.