Filtration Membrane Discs
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Complete your filtration membrane discs with the necessary accessories.
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Tools To Complete Your Filtration Process
Vacuum filter holder kits for complete filtration.
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Tools To Complete Your Filtration Process
Vacuum pumps for daily microbiological filtration.
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Tools To Complete Your Filtration Process
Magnetic filter funnels for sterile filtration and clarification.
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Watch This Video
Vacuum Filtration Made Easy
This video shows how to perform vacuum filtration with Merck's Isopore™ membrane filters and Millicup Flex disposable vacuum filtration units in a few simple steps:
- Select the appropriate 47mm membrane filter
- Assemble the filtration unit and connect vacuum source
- Filter solution
- Remove filtration device and recycle
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Frequently Asked Questions
What is the difference between hydrophilic and hydrophobic membrane filters?
Hydrophilic membrane filters are typically used with water and aqueous solutions. They can also be used with compatible non-aqueous fluids. Hydrophilic membrane filters are typically not used for air, gas or vent filtration since the filters would block flow if inadvertently wetted, for example by condensation.
When should I choose a sterile or non-sterile membrane filter?
This will depend on the processing applications: If the solution is already sterilized, choose a sterile filter. If your solution is going to be filtered through a sterilization process, a non-sterile filter could also work.
How do I select a suitable pore size?
Pore size is determined by the size of the particles (in microns) that we want to separate. For more than 3µm, choose a filter membrane with pore size 0.45µm and for less than 3µm, choose a poor size of 0.22µm. The lower the membrane micron rating the finer the filtration.