Filtration Membrane Discs
Thin, precut membrane rounds for high-throughput, fast filtration of liquid and gas samples. Gridded and non-gridded discs. Various materials including mixed cellulose ester, polycarbonate, PTFE, nylon, and PVDF. For air monitoring/analytical research.
Sizes
Filter membranes are made in a range of diameters, typically designed to fit a specific holder or manifold.
Materials
Filter membrane can be made from cellulose, mixed cellulose esters (MCE), polyvinylidene fluoride (PVDF), polyethersulfone (PES), polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), nylon, polycarbonate (PC), polyester, polyethylene terephthalate (PET), and polypropylene (PP). Other membrane materials include aluminum oxide, gelatin, porcelain, and glass.
Pore Size
The size of membrane pores determines which particles will be retained by the filter. A pore size of 0.2 µm is small enough to remove microbes from solutions; a 0.45 µm ore size can remove larger particulates.
Color and Grids
White membrane filters may be plain or marked with square grids (outlined in black) that can help with enumerating particles. Gridded or plain black membrane filters may be helpful when filtering light-colored particulates.
Sterility
Filter membranes may be pre-sterilized or may be sterilized using ethylene oxide, gamma irradiation, or autoclaves. The need for sterility is determined by the application, which are many and varied:
- Light microscopy samples
- Cytology sample preparation
- Electron microscopy samples
- Air quality and other environmental monitoring
- Water analysis and water quality testing
- Microbiology colony counting and quality control
- Chemotaxis
- Sterile preparation of buffers, tissue culture media, microbiological media, and other biological fluids
MilliporeSigma™ Durapore™ Membrane Filters, 0.22 μm
Recommended when maximum recovery is important. Durapore™ PVDF Membranes: 0.22μ Pore Size provide high flow rates and throughput, low extractables, broad chemical compatibility and low protein binding. Available in diameters ranging from 13mm to 142mm.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.45 μm
MF-Millipore™ Membrane Filter are mixed cellulose esters (MCE) membrane, hydrophilic.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 5 μm
MF-Millipore™ Membrane Filter are mixed cellulose esters (MCE) membrane, hydrophilic.
Cytiva Whatman™ Nylon Membranes
Flexible and durable for easier handling. Cytiva Nylon Membranes are naturally hydrophilic, eliminating need for wetting agents and prewetting when filtering aqueous solutions.
MilliporeSigma™ Express™ PLUS Membrane Filters
Plain white polyethersulfone Express™ PLUS Membrane Filters provide ultrafast filtration for a variety of applications.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.45 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Nylon Net Filters, 0.45 μm
Hydrophilic nylon membrane
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.8 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.8 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
Sartorius Gridded Nonsterile Cellulose Nitrate Membrane Filters: 1.2μm Pore Size
The non-sterile membrane filters are made of cellulose nitrate (cellulose mixed ester), cellulose acetate or regenerated cellulose. They can be used for colony counting, particle testing and microscopy. Choose between gridded or non-gridded, membranes, either with or without hydrophobic edge.
MilliporeSigma™ Fluoropore™ Membrane Filters, 0.45 μm
Hydrophobic membrane with laminated backing for easier handling
Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters
Membrane Filters for Colony Counting, Particle Testing and Microscopy - Cellulose nitrate (cellulose ester), gridded, individually, sterile packaged
MilliporeSigma™ Durapore™ Membrane Filters, 0.45 μm
Durapore™ Membrane Filters are recommended when maximum recovery is important.