复方苯巴比妥散(亦称阿鲁散)是临床上常用的小儿镇痛药,其含量测定方法有银量法中和法及比色法。上述方法均操作繁琐,误差较大,我们曾采用双波长吸收光谱系数倍率法测定该制剂的含量,取得了满意的结果。本文采用一阶导数光谱 Compound phenobarbital powder (also known as Aru scattered) is a commonly used pediatric analgesics, and its determination of the amount of silver method neutralization method and colorimetry. The above methods are complicated to operate, the error is large, we have used double-wavelength absorption spectrophotometry to determine the content of the preparation, and achieved satisfactory results. In this paper, the first derivative spectrum is used