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, 5µm, 12.4cm² EFA, Non-Sterile
Ace Glass, Inc. 2.95" 105 micron polypropylene filter for #80 threaded adapters. Pkg/6.
2.95 105 micron polypropylene filter for #80 threaded adapters. Pkg/6.
EMD MILLIPORE 3P BIOPHARM MILLIPAK 200 0.22UM STR.FLT3PK
Millipak-200 , 0.22micrometer, 14 mm ( 9/16 in. ) hose barb inlet and outlet, nonsterile, 3/PK.
Ace Glass, Inc. Vacuum trap inner tube only, 24mm OD, #15 Ace-Thred side arm
Vacuum trap inner tube only, 24mm OD, #15 Ace-Thred side arm
Hach Company Millipore S-Pak Type HC Membrane Filters, 47 mm, 0.7 um pore size, pk/600
Certified for fecal coliform analysis. Larger pore size (0.7 um) and funnel-like pores creates a less taxing environment for stressed organisms: lessens media loss from evaporation and easier filtration of high particulate samples common to effluents. Whi
Ace Glass, Inc. Fritted disc, 47mm OD, porosity A (145-174 micron), fits3702-10
47mm O.D. Porosity A (145-174 micron) fritted disc.
Biodesign Inc of Ny CellMicroSieves, 20 micron pore size, ten 47 mm circles (nonsterile)
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.
MDI Membrane FLTR MDI CN 47MM 0.45 EO 100PK
mdi Cellulose Nitrate membrane filters, 47 mm, 0.45 µm, EO-sterile, 100 PK
Tisch Scientific Nylon Membrane Filter, 10.0 µm, 47 mm, Nonsterile, 200 Pack, SF14756
Tisch nylon membrane filters are naturally hydrophilic, have high non-specific binding properties, and an extractable level of <0.0015 mg/cm^2, they are ideal for HPLC solvent and sample preparation.
Hach Company Filter, Membrane, Cellulose, Pore Size 0.8 µm, Diameter 47 mm, 100/pk, plain, non-sterile
Pall GN-4 Metricel membrane filters are made of mixed cellulose esters. Non-sterile, 0.8µm Disc Filters are suitable for air monitoring applications and meets NIOSH requirements for airborne metals and asbestos monitoring. Dissolves completely using standard digestion procedures, and clears completely for minimal interference in fiber counting. Pall GN Metricel Membrane Disc Filters autoclavable.
