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
Uline TAGBOARD-SPONTANEOUSLY COMBSTB
TAGBOARD-SPONTANEOUSLY COMBSTBLE Dot Labels and Placards 100/pack
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.05 Micron, 13mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, 0.05 Micron, 13mm, 100/Pk
EZKEM Memmbrane 25 mm Teflon Gas Diffusion 25 pk
EZkem’s 25mm Teflon Gas Diffusion Membranes are used on gas diffusion modules for chloroform extraction. (25 Pack)
Foxx Life Sciences EZLabpure™ Nylon Hydrophilic Membrane Filters, 0.45µm 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, 500mL, 1/pk, 24/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
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
Chemglass Life Sciences Fritted Disc, 20mm, Medium
Fritted Disc, 20mm, 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.