本实验方法步骤3经常是用玻璃毛细吸管画滤液细线,因为出液量比较多,不易干,待干的时间比较长;同时玻璃易碎,操作起来不太方便。本文通过实践探究,找到替代玻璃毛细吸管的工具,使这一步骤操作起来更容易、更有效。高中生物人教版必修1实验——绿叶中色素的提取和分离中的方法步骤3画滤液细线,用毛细吸管吸取少量滤液,沿铅笔线均匀地画出一条细线。待滤液干后,再画一两次。本实验探究使用其他 Step 3 of the experimental method is often used to draw fine lines of glass capillary pipette, because the amount of liquid is more difficult to dry to be dry longer; at the same time the glass is fragile, not easy to operate. This article by exploring the practice to find alternative to glass capillary pipette tools to make this step easier to operate, more effective. High School Biology PEP Required 1 Experiment - Method for extraction and separation of pigments in green leaf Step 3 Draw a thin line of the filtrate, draw a small amount of filtrate with a capillary pipette, and draw a thin line evenly along the pencil line. After the filtrate is dry, draw one or two times. This experiment explores the use of other