Whether you're filtering for analytical, clarification or sterilization purposes, our membranes are specifically selected to support your filtration needs. However, identifying which filter material to use based on the properties of the fluid or gas type is absolutely critical to achieve peak filtration performance.
- If you're most interested in the fluid coming through the membrane filter, or the filtrate, membranes that are lower in extractables and have high flow rates would best fit your needs.
- If you're analyzing what is left behind on the membrane, or the retentate, membranes with a smooth surface and proper structure will be most fitting for analytical usage.
In both applications, the nature of your fluid will also play a role in your selection, as membranes with very high binding of proteins, peptides and nucleic acids may clog prematurely, removing desired materials from the filtrate or obscuring what you want to discover in the retentate. If you are not sure what filter material to choose, our technical support team, equipped with a full analytical testing lab, can help you through the process.
|Extractables||Low||Low||Very low||Very low||Medium||Medium||Low|
|Protein binding||Low||Low||Very low||High||High||Low||Medium|
|S2||Satisfactory below 26°C only|
|M||Marginal resistance; may be satisfactory for short-term exposure|
|U||Unsatisfactory resistance; may cause failure and/or dissolve the membrane.|
View the Nalgene rapid-flow advantage
Cell culture contamination and using filtration as a final preventative measure
California Proposition 65 Warning: Products manufactured with polycarbonate (PC), polyethylene terephthalate (PET), polyethylene terephthalate glycol (PETG) or polystyrene (PS) contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.