【摘要】 <正> 硝酸银虽然可以测定一些磺胺药物,但进行直接滴定尚有困难:用K₂CrO₄作指示剂,终点不好看;用某些吸附指示剂,等当点与变色点不合,误差较大;用测电导、热量等方法确定终点,一般需要作图,手续麻烦。实际上用得较多的是间接滴定法,即加过量AgNO₃把磺胺沉淀、过滤,再用Volhard法测滤液中剩余的银,这类方法操作繁琐。更多还原

【Abstract】 In NaOAc-HOAc buffer solution containing acetone, sulfathiazole can be directly titrated with standard AgNO₃ solution using the disappearance of the incision of sulfathiazole to indicate the end point of titration. This visual method is simple, rapid, accurate and gives the same results as the official method adopted in Chinese Pharmacopoeia.更多还原