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三、用细长圆珠笔芯制作滴管1.装置图(图3)。2.制作材料及工具。细长圆珠笔芯、输液管、酒精灯、剪刀、小刀、镊子。3.制作过程。①从输液管滴液壶下端20mm处剪下滴液壶,用小刀把滴液壶上端的输液管从基部切去。②把圆珠笔芯内残留的墨汁清洗于净。③将细圆珠笔芯的一端插入滴液壶下端保留的20mm长输液管内,并插至滴液壶内,使笔芯的上端略低于滴液壶的下底部。④同样在酒精灯上把滴液壶上端的突出部分熔化后用镊子压挤将孔熔封,以不漏气为宜。四、检查滴管是否漏气将制成旳滴管吸入水后,插入烧杯中,
Third, the use of slender ball refill making pipette 1. Installation diagram (Figure 3). 2 production of materials and tools. Slender ballpoint pen core, infusion tube, alcohol lamp, scissors, knife, tweezers. 3 production process. ① Cut the drip pot from the bottom of infusion tube 20mm at the bottom, and cut the infusion tube at the top of the drip pot with a knife. ② the ball-point cartridge residual ink cleaning in the net. ③ Insert one end of a thin ballpoint pen core into the 20mm long infusion tube reserved at the lower end of the drip pot and insert it into the drip pot so that the upper end of the refill is slightly lower than the lower bottom of the drip pot. ④ Also on the alcohol lamp drip pot on the top of the prominent part of the melt after squeezing the hole with tweezers fuse, airtight appropriate. Fourth, check whether the leak pipette will be made of pipette inhaled water into the beaker,