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
Alkali Scientific CellPro™ NY Nylon Membrane Filter, 100/Pk, 90 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.
Alkali Scientific CellPro™ Cellulose Acetate (CA) Membrane Filter, 100/Pk, 47 mm, 0.45 μm
CellPro™ Cellulose Acetate (CA) Membrane Filter is a filter medium made of cellulose acetate as the main material. Cellulose acetate is a polymer material with excellent physical and chemical stability, widely used in the field of filtration and separation. CA membrane filter is formed into a filter layer with a specific pore and structure through a precise manufacturing process, which can effectively intercept impurities such as suspended particles, microorganisms, colloids, etc. in the liquid. Application • Biomedicine: used for filtering cell culture fluids, removing microorganisms and impurities, and ensuring a pure growth environment for cells. • Food and Beverage: filtering juices, beverages and other liquids, removing suspended particles and microorganisms, and improving product clarity and safety. • Laboratory Research: used for filtering various liquids in scientific research experiments to meet the requirements of experiments for liquid purity. Fe
Alkali Scientific CellPro™ MCE (Mixed Cellulose Ester) Membrane Filter, 100/Pk, 25 mm, 0.45 μm
CellPro™ MCE (Mixed Cellulose Ester) Membrane Filters are high performance filtration membranes commonly used in laboratory and industrial applications for microbiological analysis, particle monitoring, and air/water testing. These filters are composed of a blend of cellulose acetate and cellulose nitrate, combining the strengths of both materials for reliable and consistent performance. Key Features: High Porosity (up to 80–85%): Ensures fast flow rates and high throughput. Uniform Pore Structure: Provides accurate and consistent retention of microorganisms and particles. Hydrophilic Nature: Eliminates the need for pre wetting with surfactants; ideal for aqueous solutions. Low Extractables: Minimizes contamination risks in sensitive analyses. Smooth, White Surface (or Gridded Options): Makes it easy to visually inspect and count colonies during microbiological testing.
Tisch Scientific MCE Membrane Filters
Tisch MCE membrane filters are developed from a mixture of cellulose acetate and cellulose nitrate and are one of the most widely used filters in both air monitoring and analytical applications. These filters are gridded for microbial cell counting and particle detection.
Chemglass Life Sciences Fritted Disc, 10mm, Medium
Fritted Disc, 10mm, Medium. Porous discs for use in fabrication of special glass apparatus. Fritted glassware is designed for low pressure vacuum filtration or gas flow. The MAX differential pressure should not exceed 15 PSI. Fritted glassware should not be exposed to excessive temperature change or direct exposure to flame due to the fact that it has less resistance to thermal shock than standard borosilicate glassware.
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
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.
Azzota Corp MPF CN-CA 47mm 0.22u S 100pk
Microporous Filter CN-CA Diameter 47mm Pore Size 0 22um Sterile 100/pk
Andwin Scientific SUPOR 450 PES .45U 47MM 100/PK
The Supor Membrane Disc Filter has a pore size of 0.45 m and a diameter of 47 mm. This product has a hydrophilic polyethersulfone membrane that features high flow rate, low protein binding, and low extractables. It is stronger than other types of membranes, namely acetate and nitrate. This product also features a very high water flow fluid filtration capacity. This is sold in a pack of 100.