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 PTFE (Polytetrafluorethylene) Membrane Filters
Filter air and gasses, even at low differential pressures. Sartorius PTFE (Polytetrafluorethylene) Membrane Filters are permanently hydrophobic with low adsorption and excellent chemical compatibility. Choose from four pore sizes in a variety of diameters.
MilliporeSigma™ Express™ PLUS Membrane Filters
Plain white polyethersulfone Express™ PLUS Membrane Filters provide ultrafast filtration for a variety of applications.
Sartorius Polyethersulfone Membrane Filters
Polyethersulfone (PES) filters have a high internal porosity.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.45 μm
MF-Millipore™ Membrane Filter are mixed cellulose esters (MCE) membrane, hydrophilic.
Cytiva GN Metricel™ Membrane Disc Filters
Certified for the microbiological analysis of potable, waste, process, and natural waters in accordance with the Membrane Filter Technique referenced in Standard Methods for the Examination of Water and Wastewater.
Cytiva Whatman™ Polyester Drain Discs
Provides a flat surface to eliminate filter tearing or rupturing. Whatman™ Polyester Drain Discs are used to support membrane filters. They are available in a variety of diameters for use in a range of devices.
Sartorius Cellulose Acetate Membrane Filters
Combines high flow rates and thermal stability with very low adsorption characteristics. Sartorius Cellulose Acetate Membrane Filters are excellently suited for use in pressure filtration devices. Non-sterile filters in a variety of diameters and pore sizes are bulk-packed to save money and space.
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.
Sartorius Cellulose Nitrate Membrane Filters
Combines uniform pore structure with high flow and adsorption rates. Sartorius Cellulose Nitrate Membrane Filters are excellently suited for diagnostic kits. Non-sterile, hydrophilic filters in a variety of diameters and pore sizes are bulk-packed to save money and space.
Sartorius Cellulose Nitrate Membrane Filter
Cellulose nitrate membrane filters with 142 mm diameters are hydrophilic, have high flow rates thanks to their symmetrical structure and are compatible with aqueous solutions, hydrocarbons and several other organic solvents.
Sartorius Cellulose Nitrate Membrane Filter
Cellulose nitrate membrane filters with 142 mm diameters are hydrophilic, have high flow rates thanks to their symmetrical structure and are compatible with aqueous solutions, hydrocarbons and several other organic solvents.
Sartorius Cellulose Nitrate Membrane Filter
Cellulose nitrate membrane filters with 293 mm diameters are hydrophilic, have high flow rates thanks to their symmetrical structure and are compatible with aqueous solutions, hydrocarbons and several other organic solvents.
Sartorius Cellulose Nitrate Membrane Filter
Cellulose nitrate membrane filters with 293 mm diameters are hydrophilic, have high flow rates thanks to their symmetrical structure and are compatible with aqueous solutions, hydrocarbons and several other organic solvents.
Sartorius Cellulose Acetate Membrane Filter
Cellulose acetate membrane filters with 293 mm diameter combine thermal stability with exceptionally low adsorption characteristics.