按药典规定医用乙醇必须是无色澄明的,可有时购进的乙醇带有微黄色,有的甚至颜色极深,经长时间的静置或用棉花过滤都无法使其澄明,这样的乙醇用来医用从外观来说就不合符药典规定。笔者经过长时间的探索试验,用下面方法处理很理想:即在1万ml带色的乙醇中加入10%氯化钠溶液 According to Pharmacopoeia medical ethanol must be colorless and clear, and sometimes buy ethanol with a slight yellow, and some even color deep, after a long period of standing or with cotton filter can not make it clear, so that the use of ethanol To medical use from the appearance is not consistent with Pharmacopoeia regulations. The author after a long period of exploration and testing, with the following method is ideal: that is, in 10 000 ml of colored ethanol by adding 10% sodium chloride solution