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高二化学的渗析演示实验,要使用半透膜。以往采用的是动物的肠衣、膀胱,需经过加工剔除其血管、油脂后用纯碱搓洗再用清水冲洗数次备用。也有把鸡蛋壳用浓盐酸
The dialysis demonstration experiment for sophomore chemistry uses a semipermeable membrane. In the past, animal casings and bladders were used. After removing blood vessels and fats, they were washed with soda ash and rinsed with fresh water several times. There are also concentrated hydrochloric acid for egg shells