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
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.
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 1.2µm Pore Size, 90mm Diameter Membrane Filter Discs, Non Sterile, 25/PK
EZLabpure™ PTFE Hydrophobic Membrane Filters are engineered for superior chemical resistance and reliable filtration in laboratory. Available in hydrophobic & hydrophilic configurations, these PTFE membrane filter discs offer consistent flow rates & effective particle retention. Hydrophobic variants are available in 0.22 um, 0.45 um, and 1.2 um pore sizes, while hydrophilic are offered in 0.22 um and 0.45 um, with diameter options 13 mm, 25 mm, 47 mm, 90 mm and 142 mm. All filters are non-sterile and comply with USP Class VI Standards.
These Filtration Membrane Disc Filters are composed of pure PTFE membrane bonded to a polypropylene support, ensuring broad chemical compatibility (pH 1–14) for filtration of solvents, acids, and aggressive chemicals. Due to their hydrophobic nature, pre-wetting with solvents such as ethanol or methanol is required before filtering aqueous solutions.
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.01 Micron, 62 x 22mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, 0.01 Micron, 62 x 22mm, 100/Pk
