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
Meissner ALpHA G Hydrophilic Polyester Microfiber Filter
Meissner ALpHA G Hydrophilic Polyester Microfiber Filter, 47mm Disc, 0.6µm, 12.4cm² EFA, Non-Sterile
Grainger Membrane Filter 47 mm 0.45 um PK1000
The Grainger 14A849 Glass Microfiber Filter, 1.6 μm, 5.5 cm Diameter, Pack of 100 is a pack of 100 glass microfiber filters with a pore size of 1.6 microns and a diameter of 5.5 cm. These high-quality binder-free borosilicate glass filters are designed for a variety of laboratory filtration applications including HPLC sample preparation, IC sample filtration, solvent filtration and air monitoring. Their low metal extractables make them ideal for trace metal analysis. The filters have >98% particle retention down to their rated pore size.
Grainger Membrane Filter 47 mm 0.45 um PK100
The LabExact Membrane Filter is a 47mm diameter hydrophilic polyethersulfone membrane filter with a 0.45μm pore size. It has low protein binding and is ideal for analytical sample preparation including HPLC. The polyethersulfone membrane is naturally hydrophilic and has low extractables. It has a high flow rate and loading capacity. This makes it useful for filtering aqueous and organic solvents. The 47mm diameter allows it to fit standard filter holders. It is sterile and individually packaged. This filter is an excellent choice for analytical sample preparation and clarification.
Biodesign Inc of Ny CellMicroSieves Sampler Pack (1 each 100, 70, 50, 35,25 micron pore sheet of 12 by 12 inches)
CellMicroSieves (TM) filters manufactured by BioDesign Inc of New York allow the separation of multiple cell types using a filter that will not bind cells or proteins. Eleven pore sizes are available in sheets (3 sheets of 12 by 12 inches per package), rolls (2 feet by 3 feet), and 47mm circles (10 per package) that are extremely useful for specific cell type separation, stem cell isolation, hybridoma production, collection of cells from media, and many other uses where a strong non-binding specific sized pore filter is needed. Can be repeatedly steam sterilized retaining its pore size. A pure nylon thread product with no extractable materials that is specifially made for biologial research.
Biodesign Inc of Ny CellMicroSieves Sampler Pack (1 each 200, 100, 50, 25, 8 micron pore sheet at 12 by 12 inches)
CellMicroSieves (TM) filters manufactured by BioDesign Inc of New York allow the separation of multiple cell types using a filter that will not bind cells or proteins. Eleven pore sizes are available in sheets (3 sheets of 12 by 12 inches per package), rolls (2 feet by 3 feet), and 47mm circles (10 per package) that are extremely useful for specific cell type separation, stem cell isolation, hybridoma production, collection of cells from media, and many other uses where a strong non-binding specific sized pore filter is needed. Can be repeatedly steam sterilized retaining its pore size. A pure nylon thread product with no extractable materials that is specifially made for biologial research.