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
Azzota Corp Microporous Filter, NYLON, Diameter: 47mm, Pore Size: 0.45um, 100/pk
Microporous Filter, NYLON, Diameter: 47mm, Pore Size: 0.45um, 100/pk.
ELKO FILTERING CO NYLON MESH FILTER 250UM 1 YARD
Nylon Monofilament Precision Woven Mesh - 250 Micron Opening, Open Area 50%, 40 Inch wide, Sold by Yard - Available from 1 - 5000 Microns - Sefar 06-250/50
Azzota Corp Microporous Filter, NYLON, Diameter: 47mm, Pore Size: 0.22um, 100/pk
Microporous Filter, NYLON, Diameter: 47mm, Pore Size: 0.22um, 100/pk.
Sterlitech Corporation Sterlitech Silver Membrane, 5 Micron, 25mm, 50/Pk
SILVER MEMBRANE FILTERS, 5.0 MICRON, 25MM, 50/PK
Tisch Scientific Nylon Membrane Filter, 0.45 µm, 47 mm, Sterile, 200 Pack, SF18013
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.
Boca Scientific Inc Mobicol filters (small/lower), 35µm pore size, 50/pack
This filter (small/lower) has a 35 µm pore size and is designed for use with Mobicol M1002, M1003, M1050 and M1053. 50 filters are included.
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 25mm, 100/Pk
PCT00325100 - Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 25mm, 100/Pk
Cole-Parmer Advantec A020G047A Sterile MCE Filters, 0.20um, 47mm Dia; 100/Pk
Mixed cellulose ester membranes are suitable for microbiological analysis of water, wastewater, pharmaceuticals, or beverages. Offered with or without grid lines; grid lines facilitate counting colonies on the membrane surface. Grid squares measure 3.1 mm and represent 1/100 of the area of a 47-mm membrane. Black membranes maximize contrast between colonies and the filter; green membrane enables viewing of black, white, and colorless colonies on a single filter. Presterilized by EtO, these 47-mm diameter filters are available in envelopes of 10, individually packaged, or now individually wrapped continuous feed. Order membranes with absorbent pad for use with broth media.
YSI 3P LifeScience Methanol Membranes, 4 each
Methanol Membranes. Used to measure methanol on YSI 2900 Series Analyzers.
Foxx Life Sciences EZLabpure™ Nylon Hydrophilic Membrane Filters, 1.2µm Pore Size, 25mm Diameter Filtration Membrane Discs, Non Sterile, 50/PK
EZLabpure™ Nylon Hydrophilic Membrane Filters are engineered for reliable particle retention, sample clarification, and broad chemical compatibility in laboratory applications. These Nylon membrane filter discs provide excellent mechanical strength, consistent flow rates, and dependable performance for aqueous and organic solutions. Available in 0.22 um, 0.45 um, 0.8 um, and 1.2 um pore sizes, and offered in 13 mm, 25 mm, 47 mm, 90 mm, 142 mm, and 293 mm diameters, all variants are supplied non-sterile. All components comply with USP Class VI Standards, ensuring material safety and consistent filtration quality.
The filtration membrane discs are recommended for particle removing filtration for water, aqueous solutions and solvents for analytical determinations such as HPLC, and filtration of these liquids. These filters are hydrophilic and suitable for HPLC sample preparations, sterile filtration of aqueous and solvent solutions, and clarification and particle removal.
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 1.2µm Pore Size, 47mm Diameter Filtration Membrane Discs, Non Sterile, 50/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.
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 0.22µm Pore Size, 25mm Diameter Filtration Membrane Discs, Non Sterile, 50/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.