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
Chemglass Life Sciences Fritted Disc, 30mm, Coarse
Fritted Disc, 30mm, Coarse. 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 Microdyn Nadir Membrane Filters, UP005, PES, UF, 150mm, 5/pk
Designation: UP005Polymer: PESSize: 150 mmManufacturer: Microdyn Nadir
Hach Company Millipore S-Pak Type HC Membrane Filters, 47 mm, 0.7 um pore size, pk/150
Certified for fecal coliform analysis. Larger pore size (0.7 um) and funnel-like pores creates a less taxing environment for stressed organisms: lessens media loss from evaporation and easier filtration of high particulate samples common to effluents. Whi
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
Microsolv Technology Corporation Filter Memb .22 Nylon 47Mm 100
Filters, Membrane, 47mm, 0.22um, Nylon. Round, AQ Brand. 100/PK.
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.
Microsolv Technology Corporation Filter Memb .22 Ptfe 47Mm 100P
Filters, Membrane, 47mm, 0.22um, PTFE. Round, AQ Brand. 100/PK.
Hach Company Replacement: COUPLER, PTFE, 47MM
Replacement Coupler for Xenosep SPE Systems Apparatus. PTFE. 47 mm.
Azzota Corp Microporous Filter, Ptfe, Diameter: 25mm, Pore Size: 0.45um, 50/Pk
Microporous Filter, PTFE, Diameter: 25mm, Pore Size: 0.45um, 50/pk