建立限量检测磺胺二甲基嘧啶中杂质的方法.采用薄层色谱法,用两种展开剂系统,分步同向展开对样品中的杂质进行检测.展开剂I为氯仿-甲醇-无水甲酸(45mL:5mL:0.15mL),展开剂Ⅱ为4%氨水(V/V)-水-硝基甲烷-二氧六环(3mL:5mL:40mL:50mL).结果表明,能简便有效地检测出磺胺二甲基嘧啶中各种可能存在的杂质,并能对其进行限量分析.
A method for limiting determination of the possible impurities in sulfadimidine by using TLC was established. Two solvent systems by stepwise-homo-direction development were used. The developer Ⅰ consists of chloroform, methanol and formic acid anhydrous (45 mL:5 mL:0.15 mL). The developer Ⅱ consists of 4% ammonia water (V/V), water, nitromethane and dioxane(3 mL:5 mL:40 mL:50 mL). It is a simple and available method for determination and limitation of the possible impurities in sulfadimidine.