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 Aluminum Oxide Membrane Filters, 0.1 Micron, 25mm, 50/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
IW Tremont Co Inc LabExact Hydrophobic PTFE membrane, NON-STERILE, 0.45 micron, 47mm diameter, pack of 100
LabExact Polytetrafluoroethylene (PTFE) Membrane is supported with a polypropylene (PP) scrim for easier handling. This scrim is bonded using a unique technique utilizing no bonding agent for purity, chemical compatibility and lower extractables. Hydrophobic material is effective in separating polar/nonpolar solvents. Aqueous solutions can pass after prewetting with methanol
Microsolv Technology Corporation Filter Memb .45 Nylon 47Mm 100
Filters, Membrane, 47mm, 0.45um, Nylon. Round, AQ Brand. 100/PK.
Lab Depot Inc 90mm PETE Membrane Disc, 0.45µm, 30/Pack
Naturally hydrophilic, the PETE membrane disc, 0.45µm, is ideal for blood assays and general filtration. This product also has a broad range of chemical compatibility, including aggressive solvents. It is low protein-binding, ensuring clean results, and has a smooth, thin, glass-like surface.
Sterlitech Corporation Polyester (PETE) Drain Disc, 293mm, 25/Pk
These Polyester Drain Discs increase flow rate and throughputs by preventing blockage or "pore blinding" of the capillary pores in screen membranes.
Ace Glass, Inc. 0.510" 350 micron polypropylene filter for #15 threaded adapters. Pkg/12.
0.510" 350 micron polypropylene filter for #15 threaded adapters. Pkg/12.
Sterlitech Corporation Polyester (PETE) Membrane Filters, 0.1 Micron, 47mm, 100/Pk
Polyester (PETE) Membrane Filters, 0.1 Micron, 47mm, 100/Pk