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
Biodesign Inc of Ny CellMicroSieves Sampler Pack (1 each 200, 100, 50, 25, 8 micron pore sheet at 12 by 12 inches)
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.
Alkali Scientific ProCycle™ Pre-cut Sealing Membranes, Non-Sterile, qPCR Optical (pressure-sensitive adhesive) ABI™ Type, 10 bags of 10 membranes
RNase, DNase, DNA, and PCR inhibitor free Evaporation rates ≤ 5% Inner packs of 10 membranes PureAmp™ Sealing Membranes are compatible with all standard PCR plates. Membrane options include pierceable aluminum, standard transparent, optically clear sticky adhesive, optically clear pressure-sensitive adhesive, and low-adhesive EZ-peel, all of which are guaranteed to keep evaporation rates below 5%.
Azzota Corp Hollow Cathode Lamp (Hcl) Nickel, 1.5 In. (37mm) Fits: Varian, Analytic Jena, Gbc, Hitachi , Shimadzu , Tja, Thermo Unicam, Thermo Elemental, Buck, Phillips, Leeman Labs, Chemito
Hollow Cathode Lamp (HCL) Nickel, 1.5 in. (37mm) diameter fit in a wide range of instruments:- Varian, Analytic Jena, GBC, Hitachi , Shimadzu , TJA, Thermo Unicam, Thermo Elemental, Buck, Phillips, Leeman Labs, Chemito and many others
Alkali Scientific Polyethersulfone (PES) Membrane disk diam.47 mm, PES 0.45, 100/Pk
Polyethersulfone (PES) membrane filter discs, 47 mm diameter, with 0.45 µm pore , designed for reliable filtration in microbiology, environmental, and laboratory applications. PES membranes provide high flow rates, low protein binding, and excellent chemical compatibility with aqueous solutions. The uniform pore structure ensures consistent retention and dependable filtration performance for routine sample preparation and analytical procedures. Suitable for use with standard 47 mm filter holders and vacuum filtration systems. Ideal for sterile filtration, water testing, and general laboratory filtration tasks where dependable performance and reproducibility are required. Supplied in a convenient pack of 100 membranes for laboratory use.
Sterlitech Corporation PTFE Unlaminated Membrane Filters, Hydrophilic, 0.5 Micron, 47mm, 100/Pk
Durable, efficient, and broadly compatible, these pure, hydrophilic PTFE membranes are ideal for use with HPLC seperations, aqueous/organic solvents, and many of your other filtration needs. Pack of 100. Pore size: 0.50 microns. Diameter: 47 mm. Advantec P/N: H050A047A.
Microsolv Technology Corporation Filter Sf .45 Nylon 25Mm Grn 1
Syringe Filters, 25mm, Nylon, 0.45um Pore Size. Green Polypropylene, AQ Brand. 1000/CS.
Microsolv Technology Corporation Filter Memb .45 Nylon 47Mm 100
Filters, Membrane, 47mm, 0.45um, Nylon. Round, AQ Brand. 100/PK.
Sterlitech Corporation Polyester (PETE) Membrane Filters, 0.1 Micron, 47mm, 100/Pk
Polyester (PETE) Membrane Filters, 0.1 Micron, 47mm, 100/Pk
Alkali Scientific CellPro™ MCE (Mixed Cellulose Ester) Membrane Filter, 100/Pk, 13 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.
Cole-Parmer PTFE Membrane, 13 mm, 0.2 m, 100/pk
Durable laminated PTFE membranes are unaffected by even the most corrosive compounds, including concentrated acids, alkaline, and propellants. Membranes withstand temperatures from –100 to 130C (–148 to 266F). Use these hydrophobic membranes for sterile venting and filtration of gas, air steams, and organic solvents. Prewet with acetone or methanol for aqueous solutions.