医院制剂中常遇到在水溶液中和滴定时终点不明显的有机酸碱金属盐如含枸橼酸钠、枸橼酸钾、苯甲酸钠等的制剂,虽可用离子交换等常规方法测定,但操作较麻烦,费时,有的方法取样量大,故试用钠电极和钾电极对6种北京的医院制剂进行测定。此法简便快速、取样量少,且复方制剂中葡萄糖、枸橼酸及色素等对测定无干扰。 Hospital preparations often encountered in aqueous solution and titration end point is not obvious organic acid alkali metal salts such as sodium citrate, potassium citrate, sodium benzoate and other preparations, although available ion exchange and other conventional methods, but the operation is more Trouble, time-consuming, and some methods sampling large, so try sodium electrode and potassium electrode on six kinds of Beijing hospital preparations were measured. This method is simple and quick, less sampling, and the compound preparation of glucose, citric acid and pigment on the determination of non-interference.