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实验室常用的硫酸、硝酸和盐酸,往往购来时为2500毫升或5000毫升大瓶装。在使用时一般需倒入500毫升以下的小瓶。为了倒瓶时安全和方便,现介绍如左下图的吸液器,可以达到倒瓶取液时既安全又简便的目的。左下图中所用玻璃管的直径为0.5厘米左右,Y型管A的管径可稍大于0.5厘米,并在A处与曲管烧接在一起。出液管B的直径不大于0.5厘米,长度约为5——7厘米,注射器要选用100毫升以上的。
Sulfuric acid, nitric acid, and hydrochloric acid commonly used in laboratories are often purchased in large bottles of 2500 ml or 5000 ml. When used, it is generally necessary to pour in vials below 500 ml. In order to ensure the safety and convenience of pouring the bottle, an aspirator such as the one on the left is introduced, which can achieve the purpose of safety and convenience when the bottle is poured and taken. The diameter of the glass tube used in the lower left is about 0.5 cm. The diameter of the Y-tube A can be slightly larger than 0.5 cm, and it is burned together with the curved tube at A. The diameter of the outlet pipe B is not more than 0.5 cm, the length is about 5-7 cm, and the syringe should be more than 100 ml.