Before the medicinal solution is injected into the human vein, a medicinal solution filter must be used to filter the compatible medicinal solution from particles, small bacteria, etc. On the premise of meeting the infusion flow rate requirements, smaller filter pore size and higher filtration rate mean more reliability. But currently, the pore sizes of sterilization filters include 0.22um filter membranem and 0.2μm filter membrane. How to choose?
In fact, regarding the filtration pore size of the filter, do you think it is really a corresponding size of pore size? The answer is no. In fact, pore diameter is a concept. Its actual microstructure is like this. It is not the real pore diameter. We generally call it the nominal pore diameter.
0.22um filter membrane can remove 99.99% of small bacterial microorganisms, meeting the requirements of GMP or pharmacopoeia, and can also remove samples, Very fine particles in the mobile phase.
Among many filter elements and filtration products, an important parameter is the filtration accuracy, usually in microns (μm), but also in terms of mesh number or other units. said, but how to detect the filtration accuracy of filter elements and filtration products?
In fact, the understanding of filtration accuracy in the domestic market has always been confusing, and the standardization of filtration accuracy is also confusing. The basic status quo is: the filtration accuracy is determined by the manufacturer through corresponding testing methods and according to the corresponding standards. (including filter element pore size, particle retention efficiency, small bacterial retention capacity, etc.).
The currently independently developed 0.22um filter membrane is the core material for liquid filtration and is prepared using special biaxial stretching technology. , can ensure that all impurities such as small bacteria are intercepted, and at the same time have a large flux. The size and uniform distribution of the membrane pores are very important. The smaller the pore size and uniform distribution of the membrane, the better the interception effect. Interested parties are welcome to enter the store for consultation.
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