小儿止咳糖浆中氯化铵的含量测定方法,各省标准大多采用活性碳脱色后以银量法测定。此法操作繁琐,且由于处方中的甘草流浸膏含氨,可使测定结果大大偏高。由于氨能溶于乙醚而氯化铵不溶,无水乙醇能除去部分糖及皂甙达到脱色的目的,我们先用乙醚提取,再加入一定量无水乙醇降低色 Pediatric cough syrup in the determination of ammonium chloride content, most of the provincial standards after the decolorization of activated carbon to determine the amount of silver. This method is cumbersome to operate, and due to the prescription of licorice extract containing ammonia, the determination results can be greatly elevated. As ammonia can be dissolved in ether and ammonium chloride insoluble, anhydrous ethanol can remove some of the sugar and saponin to achieve the purpose of decolorization, we first extracted with ether, then add a certain amount of ethanol to reduce the color