速效伤风胶囊的主要成分为对乙酰氨基酚、扑尔敏、人工牛黄等。地方药品标准对速效伤风胶囊中的对乙酰氨基酚的含量测定用的是重氮化反应的外指示剂法。此法操作繁琐,终点不易掌握。我们采用的是重氮化反应的内指示剂法测定其对乙酰氨基酚的含量,结果较为满意。现简报如下: 在样品中加入稀硫酸50ml,加热回流1h,放冷,加水50ml与溴化钾3g,将滴定管尖端 The main components of quick-acting capsules for paracetamol, chlorpheniramine, artificial bezoar and so on. Local drug standards for quick paraquat capsule acetaminophen content determination is used diazotization reaction of the external indicator method. This method is cumbersome operation, the end is not easy to grasp. We use the diazotization reaction of the internal indicator method for the determination of paracetamol content, the results are more satisfactory. Now briefing as follows: In the sample by adding dilute sulfuric acid 50ml, heated to reflux 1h, let cool, add water 50ml and potassium bromide 3g, the burette tip