在药品的研究、检验及日常工作中,药学工作者常根据需要将95%的乙醇稀释成各种不同低浓度的乙醇,所需乙醇和蒸馏水的数量往往需要计算,费事费时。现介绍一种简易方法,较为方便。方法:先将95%的乙醇倒入量筒中至所需配制的浓度(即若要配制的浓度为x%。则倒入xml),然后加入蒸馏水至95ml即得。例如: In the research, testing and routine work of pharmaceuticals, pharmacists often dilute 95% ethanol to different concentrations of ethanol according to their needs. The quantities of ethanol and distilled water required often need to be calculated and time-consuming. Now introduce a simple method, more convenient. Method: first 95% ethanol into the measuring cylinder to the required concentration (ie to prepare the concentration of x%, then pour xml), then add distilled water to 95ml that is. E.g: