医用注射器廉价易得,密闭性好,透明度高,带刻度能测量,体积小,易操作,在中学化学实验中可以用来量取、移液、作反应容器~([1])。本文巧用注射器设计一套密闭实验装置,对部分使用或生成有毒有害气体的中学化学实验进行改进,不仅环保无污染,而且节约药品,效果明显,方便有兴趣的学生动手操作,有利于培养青少年的自主创新能力。一、实验器材2支20 mL注射器、静脉输液针管、蝴蝶夹(代替止水夹使用)、200 mL烧杯、学生橡皮、刀片等。用刀片将学生橡皮切成条块,作橡皮塞使用。 Medical syringes are cheap and easy to get, with good airtightness, high transparency, with scale measurement, small size and easy operation. They can be used to measure, pipet, and react in secondary school chemistry experiments. In this paper, the use of a syringe designed to seal a closed experimental device, part of the use of toxic or harmful gases generated by the middle school chemistry experiments to improve, not only environmental pollution, and save drugs, the effect is obvious, convenient for students interested in hands-on operation is conducive to the training of young people The ability of independent innovation. First, the experimental equipment 2 20 mL syringes, intravenous needle, butterfly clip (instead of stopwatch use), 200 mL beakers, students rubber, blades and so on. Use a razor blade to cut the student rubber into strips for use as rubber plugs.