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小儿止咳糖浆系儿科常用制剂,主要成分为氯化铵(1%),甘草流浸膏(15%),桔梗流浸膏(3%),橙皮酊(2%)等。其氯化铵的含量测定有采用测氨法的。其方法为:将小儿止咳糖浆置凯氏烧瓶中,加入氢氧化钠液,加热蒸馏,将馏出的氨吸收于硼酸液中,用硫酸液滴定。但因甘草流浸膏中也含有氨(部分和甘草酸结合成铵盐),致使测定结果偏高,误差较
Pediatric cough syrup pediatric commonly used preparations, the main components of ammonium chloride (1%), liquorice flow extract (15%), Campanulaceae flow extract (3%), orange peel tincture (2%) and so on. The determination of ammonium chloride using the ammonia test method. The method is as follows: pediatric cough syrup set in Kjeldahl flask, adding sodium hydroxide solution, heated distillation, the distillate ammonia is absorbed in the boric acid solution, titration with sulfuric acid. However, liquorice extract also contains ammonia (part of glycyrrhizic acid combined with ammonium salt), resulting in high measurement results, the error is