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™ ME 24 Plain Mixed Cellulose Ester Membranes
Enables the uptake of growth media to the bacterial colonies without chemically inhibiting their growth. Whatman™ ME 24 Plain Mixed Cellulose Ester Membranes are composed of cellulose acetate and cellulose nitrate, which provides a more uniform surface.
Cytiva Whatman™ 0.6 μm Pore Size (ME 26) Mixed Cellulose Ester Membranes, Plain
Whatman™ (ME 26) Mixed Cellulose Ester Membranes are particularly effective in applications requiring higher flow rates and larger volume filtration, including clarification or sterilization of aqueous solutions, particulate analysis and removal, air monitoring, and microbial analysis.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 1.2 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
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™ Fluoropore™ Membrane Filters, 0.5 μm
Hydrophobic membrane with laminated backing for easier handling
MilliporeSigma™ Fluoropore™ Membrane Filters, 0.45 μm
Hydrophobic membrane with laminated backing for easier handling
Sartorius Nongridded Sterile Cellulose Membrane Filters
Ensure quality control in routine microbiological filtering. Sartorius Nongridded Sterile Cellulose Membrane Filters are single-packed membranes used for colony counting, particle testing, microscopy and sterility testing. Choose between cellulose acetate or cellulose nitrate membranes in a variety of pore sizes.
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.
Sartorius Environmental Air Monitoring Gelatin Membranes
Collect airborne microbes and viruses. Sartorius Environmental Air Monitoring Gelatin Membranes guarantee reliable and accurate results. They are sterile and water soluble with a high retention rate. Choose from a range of sizes in single-wrapped disposable filters with holders or packs of filter disks.
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 Acetate Membrane Filter
Cellulose acetate membrane filters with 293 mm diameter combine thermal stability with exceptionally low adsorption characteristics.
Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters
Membrane Filters for Colony Counting, Particle Testing and Microscopy - Cellulose nitrate (cellulose ester), gridded, individually, sterile packaged
Sartorius Gridded Nonsterile Cellulose Nitrate Membrane Filters: 0.8μm 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.
Cytiva Whatman™ 0.45 μm Pore Size (ME 25) Mixed Cellulose Ester Membranes, White/Black Grid
Whatman™ (ME 25) Mixed Cellulose Ester Membranes, White/Black Grid are particularly effective in applications requiring higher flow rates and larger volume filtration. Supplied with clearly defined grid lines at regularly spaced intervals to assist in microbiological colony counting.
Cytiva Whatman™ Mixed Cellulose Ester Membranes
Color contrast helps easier particle detection.