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水质分析中的半微量滴定法,给野外调查带来很大方便,笔者在多年的水质化验工作中,摸索出更简易的方法,现介绍如下: 1.滴定管的组装 选择1—2毫升刻度吸管,要一级标准管,不完全流出式的。最小分度为0.01毫升。吸管下端套上毛细管。毛细管选择市面上喝饮料的塑料管或小儿头皮针粗塑料管,即外径可套在自行车气门芯胶管内或可直接套在刻度吸管下端,(即直径约3毫米),用酒精灯将塑料管拉成细尖,长度为2.5—3.0厘米,剪成小段即可(制做方法如图)。用自行车气门芯胶管一小段(约2厘米),将毛细管和刻度吸管连接套在一起,组装成半微量滴定管。如图。
Semi-micro-titration of water quality analysis, to bring great convenience to the field investigation, the author in many years of water quality testing work to find out more simple method, are as follows: 1. Burette assembly selection 1-2 ml graduated pipette , To a standard tube, not entirely out of style. The smallest graduation is 0.01 ml. Put the capillary on the bottom of the pipette. Capillary Select the market drink plastic tube or plastic scalp needle children, that is, the outer diameter can be set in the bicycle valve core hose or can be set directly in the bottom of the graduated pipette (ie, about 3 mm in diameter), with alcohol lamp plastic Tube pulled into a thin tip, a length of 2.5-3.0 cm, cut into small pieces can be (making methods as shown). Use a bicycle valve core hose a short piece (about 2 cm), the capillary and graduated pipette connected together, assembled into semi-microtiter pipe. As shown.