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
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.4 Micron, 47mm, 100/Pk
Polycarbonate Track Etch (PCTE) membranes are made from a thin, microporous polycarbonate film material. It is ideally suited for use in blood assays and high-purity and general filtration.
Sigma Aldrich Fine Chemicals Biosciences Whatman(R) membrane filters nylon pore size 0.8 mum, diam. 47 mm |
Whatman(R) membrane filters nylon pore size 0.8 mum, diam. 47 mm |
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 1.0 Micron, 47mm, 100/Pk
Polycarbonate Track Etch (PCTE) membranes are made from a thin, microporous polycarbonate film material. It is ideally suited for use in blood assays and high-purity and general filtration.
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, Black, 0.2 Micron, 25mm, 100/pk
These hydrophilic, polycarbonate track-etch (PCTE) membrane filters have been pigmented using black dye to minimize membrane autofluorescence. The dyed PCTE membrane filters are ideal for use with fluorescence microscopy analyses that involve direct observation and enumeration of animal cells or microorganisms that have been labeled with fluorescent markers. They are also suitable for optical microscopy studies of light colored particles and microorganisms by providing a dark background for enhanced contrast.
Sterlitech Corporation Polycarbonate (PCTG) Gold-Coated Membrane Filters, 0.4 Micron, 40/20nm Coating, 25mm, 10/Pk
Polycarbonate track-etched membranes feature a plain surface and round pores, providing ideal properties for particle analysis.Applications:* Asbestos testing* SER-s based detection for pahtogen concentration* Sample Preparation* Low protein binding* Smooth flat surface for good visibility of particles
Chemglass Life Sciences Porous PTFE Filter Disc, 19mm & 25.4mm
Porous PTFE Filter Disc, 19mm & 25.4mm. 50 micron porosity PTFE filter disc. Replacement part for CG2093 series of PTFE Flake Retaining Cup.