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™ MF-Millipore™ Membrane Filter, 0.45 μm
MF-Milliporeâ„¢ Membrane Filter are mixed cellulose esters (MCE) membrane, hydrophilic.
MilliporeSigma™ Durapore™ Membrane Filters 0.45 μm
Recommended when maximum recovery is important
Fisherbrandâ„¢ General Filtration Membrane Filters
Useful for most filter applications
MilliporeSigmaâ„¢ Expressâ„¢ PLUS Membrane Filters
Plain white polyethersulfone Expressâ„¢ PLUS Membrane Filters provide ultrafast filtration for a variety of applications.
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.
Sartorius PTFE (Polytetrafluorethylene) Membrane Filters
Filter air and gasses, even at low differential pressures. Sartorius PTFE (Polytetrafluorethylene) Membrane Filters are permanently hydrophobic with low adsorption and excellent chemical compatibility. Choose from four pore sizes in a variety of diameters.
Cytiva Whatmanâ„¢ Anodiscâ„¢ Filter Membranes
Constructed with precision pore structure and narrow pore size distribution. Whatmanâ„¢ Anodiscâ„¢ Filter Membranes ensure a high level of particle removal efficiency. Captures microorganisms and particulates on the surface of the membrane for subsequent analysis.
Sartorius Polyamide (Nylon) Membrane Filters
Recommended for particle-removing filtration of water, aqueous solutions and solvents for analytical determination. Sartorius Polyamide (Nylon) Membrane Filters are white, non-sterile filters without grids. Choose from two pore sizes in four diameters. Bulk packed for space and cost savings.
Cytiva Whatmanâ„¢ Mixed Cellulose Ester Membrane Filters
Whatmanâ„¢ Mixed Cellulose Ester Membrane Filters are biologically inert and offers high degree of internal surface area for greater product adsorption.
Cytiva Whatmanâ„¢ Type WCN Cellulose Nitrate Membranes
Recommended for majority of routine applications, this membrane is manufactured under strictly controlled conditions. Whatmanâ„¢ Type WCN Cellulose Nitrate Membranes narrow pore size distribution for improved surface capture and analysis.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 8 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters: 0.8 μm
Gridded Sterile Cellulose Nitrate Membrane Filters for colony counting, particle testing and microscopy. Cellulose nitrate (cellulose ester), gridded, individually, sterile packaged filters.
Sartorius Nongridded Sterile Cellulose Membrane Filters
Ensure quality control in routine microbiological filtering. Sartorius Nongridded Sterile Cellulose Membrane Filters are single-packed membranes used for colony counting, particle testing, microscopy and sterility testing. Choose between cellulose acetate or cellulose nitrate membranes in a variety of pore sizes.
Cytiva Whatman™ 0.45 μm Pore Size (ME 25) Mixed Cellulose Ester Membranes, White/Black Grid
Whatmanâ„¢ (ME 25) Mixed Cellulose Ester Membranes, White/Black Grid are particularly effective in applications requiring higher flow rates and larger volume filtration. Supplied with clearly defined grid lines at regularly spaced intervals to assist in microbiological colony counting.
GVS PCTE Filter Membranes: Plain Hydrophilic
Smooth, flat surface for even distribution in a single plane.