Made of a thin layer of a semi-permeable material, the membrane can separate substances when a driving force is applied. Membrane filtration is a good method to remove bacteria, microorganisms, particulates, and natural organic material.
Before you identify which filter material suitable to use, you should find out the properties of the fluid or gas type which is the key element to achieve the best result of filtration in the lab.
When you are going to analyze the fluid coming through the membrane filter, membranes that have lower extractability and high flow rates can achieve your request best. If you’re working on the left behind on the membrane, or the retentate, membranes with a smooth surface and proper structure will be perfect most for the analytical application.
In both conditions, the nature of your fluid will also play a role in your selection. Membranes with the very high binding of proteins, peptides or nucleic acids are easy to be clogged. It will interfere with the result by removing desired materials from the filtrate or obscuring what you need in the retentate.