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
MilliporeSigma™ Nylon Net Filters, 0.2 μm
Hydrophilic nylon membrane.
MilliporeSigma™ Mitex™ Membrane Filters, 10 μm
Unlaminated for extreme chemical or temperature conditions
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.
MilliporeSigma™ Mitex™ Membrane Filters, 5 μm
Unlaminated for extreme chemical or temperature conditions
MilliporeSigma™ Isopore™ Membrane Filters, 1.2 μm
Use for analyses of airborne contaminants and other particles using optical or electron microscopy. Isopore™ Polycarbonate Membrane Filters have a smooth, glass-like surface for clearer sample observation. Available in a variety of pore sizes/flow rates, diameters and colors.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.1 μm
13 mm diameter, mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Fluoropore™ Membrane Filters, 0.22 μm
Hydrophobic membrane with laminated backing for easier handling
MilliporeSigma™ Fluoropore™ Membrane Filters, 1 μm
Hydrophobic membrane with laminated backing for easier handling
MilliporeSigma™ Nylon Net Filters, 10 μm
Hydrophilic nylon membrane
Sartorius Gridded Nonsterile Cellulose Nitrate Membrane Filters: 0.2μm Pore Size
The non-sterile membrane filters are made of cellulose nitrate (cellulose mixed ester), cellulose acetate or regenerated cellulose. They can be used for colony counting, particle testing and microscopy. Choose between gridded or non-gridded, membranes, either with or without hydrophobic edge.
MilliporeSigma™ Isopore™ Membrane Filters, 0.6 μm
Use for analyses of airborne contaminants and other particles using optical or electron microscopy. Isopore™ Polycarbonate Membrane Filters have a smooth, glass-like surface for clearer sample observation. Available in a variety of pore sizes/flow rates, diameters and colors.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 3 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Nylon Net Filters, 180 μm
Hydrophilic nylon membrane