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木杨酸钠合剂中水杨酸钴的含测方法,虽然各地制剂操作手册均有介绍,但(?)者从操作中感到,终点变色不敏锐,难于判断。故本单位多年来没对其进行含测。为弥补该制剂含测的不足,我们摸索出如下方法。实验部分一.处方:水汤酸钠10.0 硫代硫钠酸钠0.2碳酸氢纳5.0蒸馏水加至100.0 二.原理:中和法三.操作:样品(1):精取检品2ml,加蒸馏水10ml,乙醚10ml,溴酚兰指示剂10滴。用N/10HCl滴定至水层显黄色(总碱量)。
Salicylic acid containing sodium salicylate mixture containing test methods, although the preparation of operating manuals are introduced, but (?) Who felt from the operation, the end discoloration is not sharp, it is difficult to judge. Therefore, this unit has not tested it for many years. To make up for the lack of measurement of the preparation, we explore the following methods. Experimental Part I. Prescription: sodium thiosulfate 10.0 sodium thiosulfate 0.2 0.2 sodium bicarbonate distilled water added to 100.0 II. Principle: Neutralization Act III. Operation: Sample (1): 2 ml of refined extract, add distilled water 10ml, ether 10ml, bromophenol blue indicator 10 drops. Titration with N / 10HCl water layer was yellow (total alkali content).