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
MDI Membrane NYLON DISC 25MM 0.2UM 100/PK
mdi Nylon-66 Disc filters, 25 mm, 0.2 µm, HPLC Certified, non-sterile, 100 PK
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, PVP-Free, 1.0 Micron, 25mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, PVP-Free, 1.0 Micron, 25mm, 100/PkPrecisely controlled cylindrical pores for maximum absolute particulate captureTransparent, smooth flat surface for microscopic workLowest, non-specific binding membraneNarrow pore size distributionNo sloughing or particle shedding, one integral plastic filmNegligible adsorption or absorptionLow extractables
Ibidi USA ibiSeal 76x114
A self-adhesive cover film for sealing open wells and reservoirs in cell culture and microscopy applications. Convenient sealing of ibidi labware products. Easy to apply – easy to remove. Broad range of applications (e.g., reduction of evaporation, maintenance of sterility, and sample transport)
Azzota Corp Microporous Filter, Cn-Ca, Diameter: 25mm, Pore Size: 0.45um, 200/Pk
Microporous Filter, CN-CA, Diameter: 25mm, Pore Size: 0.45um, 200/pk
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.
Sterlitech Corporation Polyester (PETE) Membrane Filters, 1.0 Micron, 25mm, 100/Pk
Sterlitech polyester track etch (PETE) membrane filters, 1 micron pore size, 25 mm diameter, pack of 100. Hydrophilic, solvent resisant film for blood assays, microscopy, and highly caustic samples.
Foxx Life Sciences EZLabpure™ PTFE Hydrophobic Membrane Filters, 0.45µm Pore Size, 142mm Diameter Filtration Membrane 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.
Foxx Life Sciences EZLabpure™ Nylon Hydrophilic Membrane Filters, 0.22µm Pore Size, 47mm Diameter Membrane Filter 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.
Alkali Scientific Media Storage Bottles, Polystyrene, VFS, Neck 45mm, 1000mL, 1/pk, 12/cs
These vacuum bottle top filter systems provide a cost effective and efficient solution for sterilizing and clarifying aqueous biological media. Featuring a 0.22 μm PES (polyethersulfone) membrane, they offer high flow rates, low protein binding, and minimal chemical extractables—ideal for general purpose laboratory filtration where extreme chemical resistance is not required. • High flow rates and throughput • Low protein adsorption and low extractables • 0.22 μm PES membrane for reliable sterilization • Sterile, non pyrogenic, DNase/RNase free • E beam sterilized, SAL = 10⁻⁶ • Individually packaged in sterile bags • Endotoxin free and pyrogen free
Alkali Scientific CellPro™ NY Nylon Membrane Filter, 100/Pk, 13 mm, 0.45 μm
CellPro™ NY (Nylon) Membrane Filters are durable, hydrophilic membranes made from high quality nylon polymer, designed for general purpose filtration of aqueous solutions and many organic solvents. These membranes provide excellent mechanical strength, high flow rates, and broad chemical compatibility, making them suitable for sample preparation, sterilization, microbiology, and analytical applications. Nylon membranes exhibit low extractables and reliable binding characteristics for nucleic acids and proteins, supporting use in biochemical and environmental testing workflows. Because of their hydrophilic structure, they require no pre wetting and allow fast, efficient filtration of both acidic and alkaline solutions. Available in multiple pore s and diameters, these filters are supplied in convenient packs of 100, ready for routine laboratory and research use.