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
Merck 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.
Fisherbrand™ Mixed Cellulose Ester Membranes Sterile Filter
Fisherbrand™ Mixed Celluloses Esters Membranes Sterile Filters are composed of cellulose acetate and cellulose nitrate.
Fisherbrand™ Mixed Celluloses Esters Membranes Non-sterile Filter
Fisherbrand™ Mixed Celluloses Esters Membranes Non-sterile Filters are composed of cellulose acetate and cellulose nitrate.
Cole Parmer™ Nylon Membranes
Ideal for filtering or sterilizing nonprotein-containing biological solutions.
Merck Durapore™ Membrane Filters 0.45 μm
Recommended when maximum recovery is important
Merck Durapore™ Membrane Filters, 0.45 μm
Durapore™ Membrane Filters are recommended when maximum recovery is important.
Sartorius Stedim Biotech™ Nitrocellulose Membrane for Blotting
Sartorius Stedim Biotech™ Nitrocellulose Membrane for Blotting combines the advantages of high protein binding capacity with low background and high membrane stability.
Merck Durapore™ Membrane Filters, 0.1 μm
Durapore™ Membrane Filters are recommended when maximum recovery is important.
Sartorius Stedim Biotech™ Polyethersulfone (PES) Membrane Filters, Type 15407
Hydrophilic membrane filters with high flow rates, a low non-specific protein adsorption and chemical resistance over a pH range of 1 – 14.
Fisherbrand™ Cellulose Membranes
Suitable for Clarification and sterilizing filtration of biological fluids . Fisherbrand™ Cellulose Membranes filters are composed of pure cellulose acetate modified to offer researchers the lowest binding filters available.
Sartorius Stedim Biotech™ Polyethersulfone (PES) Membrane Filters
General purpose membrane that provides excellent performance with most solutions when retentate recovery is of primary importance.
Sartorius™ Type 144 Hydrosart™ Regenerated Cellulose (RC) Ultrafiltration Membranes
Type 144 Hydrosart™ Regenerated Cellulose (RC) Ultrafiltration Membranes are highly hydrophilic and have extended chemical compatibility. Easy to clean and autoclavable, they are ideal for protein recovery from dilute samples and work under aseptic conditions.
Merck MF-Millipore™ Membrane Filter, 0.8 μm
Mixed cellulose esters (MCE) membrane, hydrophilic