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
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)
Andwin Scientific SUPOR 450 PES .45U 47MM 100/PK
The Supor Membrane Disc Filter has a pore size of 0.45 m and a diameter of 47 mm. This product has a hydrophilic polyethersulfone membrane that features high flow rate, low protein binding, and low extractables. It is stronger than other types of membranes, namely acetate and nitrate. This product also features a very high water flow fluid filtration capacity. This is sold in a pack of 100.
YSI 3P LifeScience Methanol Membranes, 4 each
Methanol Membranes. Used to measure methanol on YSI 2900 Series Analyzers.
Sterlitech Corporation PTFE Unlaminated Membrane Filters, 5.0 micron, 47mm, 50/Pk
PTFE Unlaminated Membrane Filters, 5.0 micron, 47mm, 50/Pk
EMD MILLIPORE 3P BIOPHARM MILLIPAK 200 0.22UM STR.FLT3PK
Millipak-200 , 0.22micrometer, 14 mm ( 9/16 in. ) hose barb inlet and outlet, nonsterile, 3/PK.
Sterlitech Corporation Nylon Membrane Filters, 0.2 Micron, 142mm, 25/Pk
Nylon membrane disc filters: 0.2 µm pore-size, 142 mm diameter, pack of 25. Hydrophilic, low-extractable, inert, durable material supported by an internal polyester web. Typically used for HPLC, microbiology, medical/clinical, and general filtration.