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
Sartorius Microsart™ @Filter 250 in Bags
Membrane filters suitable for use in the Microsart @Filter units
Sartorius Microsart™ e.motion Membrane Filters
For colony counting, particle testing and microscopy. Specifically designed for use in the Microsart™ e.motion dispenser, the filters are individually sterile-sealed in a format packaged on a pleated band, without protective paper. Can also be used with Sartorius nutrient pad sets.
MilliporeSigma™ PVC Membrane Filters, 5 μm
For air monitoring applications to analyze silica, carbon black or quartz particulates
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.3 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Nylon Net Filters, 1.2 μm
Hydrophilic nylon membrane
MilliporeSigma™ MF-Millipore™ Membrane Filter, 3 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Omnipore™ Membrane Filters, 0.45 μm
Hydrophilic PTFE polymer membrane filter compatible with virtually all solvents, acids, and alkaline solutions. Omnipore™ Membrane Filters are biologically and chemically inert.
Cytiva Whatman™ Cyclopore PC Polycarbonate Membrane Filters
Microporous membranes featuring sharp cut-off and reproducible lab microfiltration characteristics of track-etched membrane filters
MilliporeSigma™ MF-Millipore™ Membrane Filter, 1.2 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
GVS Supported Cellulose Acetate Membranes
Pure cellulose acetate impregnated on nonwoven support
GVS Nitrocellulose-Mixed Esters of Cellulose Membrane Filters
Uniform microporous structure has low extractables, low ash
GVS Polycarbonate Track Etched (PCTE) Membrane, Hydrophilic, Disc, 0.05 μm
GVS Polycarbonate Track Etched (PCTE) Membranes are hydrophilic or hydrophobic and available in pore sizes from 0.01 to 20 μm.
GVS Poretics™ 76 mm Polycarbonate Disc
Made from a thin, microporous polycarbonate film material. It is ideally suited for use in blood assays and high-purity and general filtration. Though polycarbonate is hydrophobic, the membrane is treated with a wetting agent to make it hydrophilic.
GVS MicronSep™ 90 mm White Nitrocellulose Disc
Mixed cellulose esters (MCE) filtration membrane is an unsupported, hydrophilic membrane. Its rapid flow rate and high throughput make it ideal for use in diagnostic kit manufacturing applications.