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
Cytiva Whatman™ Nylon Membranes
Flexible and durable for easier handling. Cytiva Nylon Membranes are naturally hydrophilic, eliminating need for wetting agents and prewetting when filtering aqueous solutions.
Sartorius Polyamide (Nylon) Membrane Filters
Recommended for particle-removing filtration of water, aqueous solutions and solvents for analytical determination. Sartorius Polyamide (Nylon) Membrane Filters are white, non-sterile filters without grids. Choose from two pore sizes in four diameters. Bulk packed for space and cost savings.
MilliporeSigma™ Hydrophilic Nylon Membrane Filter
For use in clarification of aqueous solutions, particle removal and analysis.
GVS Magna™ Nylon Membrane Filters
Plain white nylon membranes offer low extractables, high uniformity
MilliporeSigma™ Nylon Net Filters, 0.2 μm
Hydrophilic nylon membrane.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.8 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
Fisherbrand™ General Filtration Membrane Filters
Useful for most filter applications
MilliporeSigma™ Isopore™ Membrane Filters, 10 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™ Mitex™ Membrane Filters, 10 μm
Unlaminated for extreme chemical or temperature conditions
MilliporeSigma™ Nylon Net Filters, 180 μm
Hydrophilic nylon membrane
MilliporeSigma™ Nylon Net Filters, 1.2 μm
Hydrophilic nylon membrane
Spectrum™ Spectra Mesh™ Woven, Nylon Filters
Consist of individual strands woven into a mesh screen
GVS PCTE Filter Membranes: Plain Hydrophilic
Smooth, flat surface for even distribution in a single plane.
GVS PCTE Filter Membranes: PVP-free Hydrophobic
Smooth, flat surface for even distribution in a single plane