Filtration Membrane Discs
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
Fisherbrand™ Mixed Cellulose Ester Membranes Sterile Filter
Fisherbrand™ Mixed Celluloses Esters Membranes Sterile Filters are composed of cellulose acetate and cellulose nitrate.
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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.
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Fisherbrand™ Polyethersulfone Membranes
Fisherbrand™ Polyethersulfone Membranes features highly asymmetrical pore structure that offers effective loading capacity and high flow rate.
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Cytiva Whatman™ Type WCN Cellulose Nitrate Membranes
Recommended for majority of routine applications, this membrane is manufactured under strictly controlled conditions. Whatman™ Type WCN Cellulose Nitrate Membranes narrow pore size distribution for improved surface capture and analysis.
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Fisherbrand™ PTFE Filter Membranes
Fisherbrand™ PTFE membrane is hydrophobic filter made of polytetra-fluorethylene laminated with PP layer.
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Sartorius™ 11306 Series Non-Sterile Cellulose Nitrate (CN) Membrane Filters
11306 Series Non-Sterile Cellulose Nitrate (CN) Membrane Filters are hydrophilic, have high flow rates thanks to their symmetrical structure, and are compatible with aqueous solutions (pH 4 – 8), hydrocarbons, and several other organic solvents.
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.
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Merck MF-Millipore™ Membrane Filter, 0.65 μm
MF-Millipore™ Membrane Filter composed of mixed cellulose esters (MCE) membrane, hydrophilic.
Cole Parmer™ Nylon Membranes
Ideal for filtering or sterilizing nonprotein-containing biological solutions.
Sartorius Polycarbonate Track Etch Membrane Filters
Manufactured from high grade polycarbonate film using track-etch technology.
Merck MF-Millipore™ Membrane Filter, 1.2 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
Merck MF-Millipore™ Membrane Filter, 1.2 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
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.