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中国药典1953年版氧化鋅軟膏含量测定法,在使用中感到有費时間、人力較多和結果不够准确的缺点。曾按下法进行試驗,結果在工作效率、准确度方面,都有很大程度的提高。茲介紹如下: 取本品約4g,置已秤定重量的燒瓶中,精密秤定,在水浴上加热,使凡士林熔融,由瓶壁流至瓶底。精密加入N/_lH_2SO_4液25ml,在沸水浴上加热40—60分鐘,冷却至約56°—65℃,加入氯仿10ml,使凡士林溶解(此时如温度过低,凡士林已凝結,加入氯仿溶解
Chinese Pharmacopoeia 1953 edition of zinc oxide ointment assay, in the use of time-consuming, more manpower and the results are not accurate enough shortcomings. Have pressed the test method, the results in the work efficiency, accuracy, have greatly improved. Here are the introduction: Take about 4g of this product, set the weight of the flask has been set, the precise scale set in the water bath to heat, so that vaseline melted from the bottle wall flow to the bottom. Precisely adding 25ml of N / _lH_2SO_4 solution, heating in a boiling water bath for 40-60 minutes, cooling to about 56 ° -65 ° C, adding chloroform 10ml, so vaseline dissolved (at this time if the temperature is too low, Vaseline has coagulation, dissolved in chloroform