一、仪器装置此装置由以下部分组成: 1、蒸馏瓶:容量为1000ml。颈长15cm,内径3cm。 2、冷凝管:球形,长25cm,插入蒸馏瓶之一端,具有两只挂测定管的小钩。 3、测定管:长10cm,内径1.1cm,回水管长4 cm,内径0.15～0.2cm(如图),回水管以上具刻度部分容积为3 ml,以下部分为2 ml,并具有0.1ml的刻度。以上部分为硬质玻璃制成,用磨口或包金属箔的软木塞连接。 First, the instrument device This device consists of the following components: 1, the distillation flask: a capacity of 1000ml. The neck length is 15cm and the inner diameter is 3cm. 2. Condensation tube: spherical, 25cm long, inserted into one end of the distillation flask, with two small hooks hanging the assay tube. 3, measuring tube: length 10cm, diameter 1.1cm, return pipe length 4cm, diameter 0.15 ~ 0.2cm (see picture), the back part of the pipe with a volume of 3ml, the following part is 2ml, and has 0.1ml Scale. The above sections are made of hard glass and are connected with ground or cork-clad cork stoppers.