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针头式滤器过滤时应注意滤膜安装。 针头式滤器对于抽滤少量液体简便,但如果在安装微孔滤膜不注意,则会前功尽弃。常规滤器中有一橡皮圈,把微孔滤膜压在下面,表面看起来密封,实际上橡皮圈与滤器周边未能完全被滤膜隔离,过滤时液体成线状流出,不能达到无菌效果。考虑到无菌过滤原理,橡皮圈与滤器周边也应有滤膜,安装滤膜时,几张滤膜部分重叠,扩大滤膜范围,过
Needle filter should pay attention to filter installation. Needle filter is simple and convenient for suction filtration of small amounts of liquid, but if you do not pay attention to the installation of the microporous membrane, it will give up all your work. In the conventional filter, there is a rubber band, the microporous membrane is pressed underneath, and the surface looks sealed. In fact, the rubber ring and the periphery of the filter are not completely separated by the filter membrane, and the liquid flows out in a linear fashion during filtration, and the sterility cannot be achieved. Taking into account the principle of sterile filtration, the rubber ring and the filter should also have a filter around the filter. When the filter is installed, some of the filters overlap to expand the scope of the filter.