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西咪替丁(cimetidine)亦称甲氰咪胍,作为组胺H_2拮抗剂对胃溃疡疗效较好,中国药典(1990版)已收载,其含量测定方法采用非水滴定法。另外,还报道有紫外分光光度法、溴酸钾法等。本文根据西咪替丁具有的弱碱性,设计了pH指示剂吸吸度比值法测定其含量的方法,获得满意结果,现报道如下。指示剂的选用:精密称取西咪替丁0.2271g,加乙醇适量使溶解,定量准确加入0.1mol/L的盐酸标
Cimetidine (cimetidine), also known as cimetidine, as a histamine H 2 antagonist effect on gastric ulcer better, Chinese Pharmacopoeia (1990 edition) has been contained, the determination of the content of non-aqueous titration method. In addition, there are also reports of UV spectrophotometry, potassium bromate method. In this paper, based on the weak base of cimetidine, a method of determining the content of cimetidine by absorbance ratio of pH indicator was designed and satisfactory results were obtained. Indicator selection: Precision cimetidine 0.2271g, plus ethanol amount to dissolve, quantitatively accurately add 0.1mol / L hydrochloric acid standard