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, 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.
Foxx Life Sciences EZLabpure™ PES Hydrophilic Membrane Filters, 0.22µm Pore Size, 47mm Diameter Membrane Filter Discs, Non Sterile, 50/PK
EZLabpure™ PES Hydrophilic Membrane Filters designed for efficient sample clarification, sterile filtration of aqueous solutions, and reliable particle retention in laboratory applications. Featuring high-quality polyethersulfone (PES) membranes, these filter discs provide excellent flow rates, low protein binding, and consistent performance. These PES membrane filter discs are available in 0.22 um and 0.45 um pore sizes, and offered in 13 mm, 25 mm, 47 mm, and 90 mm diameters, all variants are supplied non-sterile for research and analytical use. All components comply with USP Class VI Standards, ensuring safety and material compatibility for laboratory environments.
These filtration membrane discs offer very low protein affinity, high permeability, long operational lifespan due to its high throughput, and minimal extractable levels. Their hydrophilic surface enables efficient performance across a wide range of liquid media and dry gas streams.
Sterlitech Corporation Aluminum Oxide Membrane Filters, 0.02 Micron, 25mm, 10/pk
Aluminum oxide membranes feature uniform, densely-packed honeycomb pore structures that contribute to precise retention and high porosity characteristics.Applications:* HPLC sample and mobile phase filtration* Filtration of aggressive organic solvents* Virus concentration and analysis* Analysis of micro plastic in water* Epifluorescence microscopy* Synthesis of nanostructures (e.g. nanotubes)Features:* Fast filtration, efficient separation and high purity* High number of tightly controlled pores in honeycomb shape* Free of organic extractables and leachables* Minimum adsorption* Transparent when wet
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 30.0 Micron, 47mm, 100/Pk
Polycarbonate (PCTE) membrane filters, 30.0 micron, 47mm 100/pack
Grainger Membrane Filter 47 mm 0.45 um PK600
The LabExact Membrane Filter is a 47mm diameter hydrophilic polyethersulfone membrane filter with 0.45μm pore size. It has low protein binding and is compatible with aqueous and organic solvents. The polyethersulfone membrane is sterilized by gamma irradiation. This filter is well-suited for analytical sample preparation including HPLC mobile phase filtration and clarification and sterilization of aqueous and organic solutions. It has a high flow rate and loading capacity. The polyethersulfone construction provides thermal, chemical and mechanical stability.
Foxx Life Sciences EZLabpure™ Polypropylene PP Hydrophilic Membrane Filters, 0.45µm Pore Size, 90mm Diameter Filtration Membrane Discs, Non Sterile, 25/PK
EZLabpure™ Polypropylene PP Hydrophilic Membrane Filters are designed for efficient particle retention, sample clarification, and routine laboratory filtration applications. Featuring high-quality PP hydrophilic membranes, these membrane filter discs provide strong chemical compatibility and reliable flow performance for aqueous solutions. Available in 0.22 um and 0.45 um pore sizes, and offered in 13 mm, 25 mm, 47 mm, and 90 mm diameters. All membrane filter discs are supplied non-sterile and comply with USP Class VI Standards for safe use in research and analytical environments.
These Filtration Disc Membranes are a preferred choice for HPLC applications. This plastic polymer has good resistance to a broad range of chemicals even at high temperatures, making it adaptable for applications ranging from air filtration. They are suitable for aqueous and organic solvent filtration, depth filtration, sterilizing gases, and trapping aqueous aerosols, and air and gas venting.
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™ Cellulose Acetate (CA) Membrane Filter, 100/Pk, 47 mm, 0.22 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
Phenomenex Inc 0.45 m, 47 mm dia., Non-Sterile
Filter Membranes, Regenerated Cellulose (RC) AF0-8443