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在药检工作中,多次发现有一些品种的检品含量总是在标示量的上限或含量超出高限。针对这一现象,笔者观察了这些品种从称量、配制到分装的全过程,并做了部分品种的对比试验。现就部分制剂含量偏高限的原因做如下分析,并提出纠正的方法。1 溶剂的缩合 乙醇与水混合后的总体积不等于两者体积之和,这是因为两者混合后,乙醇分子与水分子之间
In the drug inspection work, many times found that some varieties of seized goods content is always marked the amount of the upper limit or content exceeds the high limit. In response to this phenomenon, I observed these varieties from weighing, preparation to the whole process of dispensing, and made some varieties of comparative tests. Now part of the reasons for the high content of the reasons for the following analysis, and put forward the correct method. 1 solvent condensation Ethanol and water after the total volume is not equal to the sum of the volume of the two, it is because the two mixed, between ethanol molecules and water molecules