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笔者参照北京市卫生局《制剂手册》(1983年)、济南部队卫生部《药局技术操作手册》(1984年)和甘肃省卫生厅《医院制剂手册》(1983年)等收载的水杨酸含量测定方法,发现5ml乙醚很难使2.5g的样品溶解,5ml氯仿若不加热,样品也很难溶解,结果终点提前,搅拌后,终点颜色又消失,操作费时,在此基础上,经过修改,先加过量氢氧化钠液(0.1mol/L)于水浴加热,再用盐酸
The author refers to the Beijing Municipal Health Bureau, “Preparation Manual” (1983), the Jinan Ministry of Health, “Pharmacy Technology Operations Manual” (1984) and the Gansu Provincial Department of Health, “Hospital Preparation Manual” (1983) Determination of acid content and found that 5ml of diethyl ether is difficult to 2.5g of the sample was dissolved, 5ml of chloroform, if not heated, the sample is difficult to dissolve, the result of the end of the advance, stirring, the end of the color and disappear, the operation time-consuming, on this basis, Modify, add excess sodium hydroxide solution (0.1mol / L) in a water bath, then hydrochloric acid