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高中《生物》必修本《观察根对矿物质元素离子的交换吸附现象》实验中,根尖的制备以及去阳离子水的制取至关重要,它直接影响到实验结果。现就我的做法简介如下。1 制取去阳离子水 1.目的 用阳离子交换树脂(我选用的是磺酸型苯乙烯—二乙烯苯强酸性阳离子交换树脂)对天然水进行处理,除去阳离子,代替本实验中的蒸馏水进行染色后浮邑的漂洗和对比实验。
In the high school “Biology” compulsory book “observation of the root of mineral elements in the exchange adsorption phenomenon” experiment, the preparation of root tips and to the preparation of decationized water is crucial, it directly affects the experimental results. Here is my brief introduction to the practice. 1 Preparation of cationic water 1. Purpose The cation exchange resin (I chose sulfonic acid type styrene-divinylbenzene strong acid cation exchange resin) to treat natural water, remove cations, instead of the distilled water in this experiment After the rinsing rinse and contrast experiments.