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™ e.motion Membrane Filters
Membrane Filters suitable for use in the Microsart e.motion dispenser
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.
MilliporeSigma™ Fluoropore™ Membrane Filters, 0.45 μm
Hydrophobic membrane with laminated backing for easier handling
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.
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™ Non-Sterile Cellulose Nitrate Membranes
Narrow pore size distribution for improved surface capture and analysis.
GVS Magna™ Nylon Membrane Filters
Plain white nylon membranes offer low extractables, high uniformity
GVS Nitrocellulose-Mixed Esters of Cellulose Membrane Filters
Uniform microporous structure has low extractables, low ash
GVS Speed Pack
Gridded white or black sterilized MCE membranes in continuous folded ribbon for easy dispensing and convenience, compatible with various dispensers (Microsart E-motion EZ-Pak EZ-Pak Curve Whatman Membrane Butler)
GVS Nylon 66 (NY) Membrane, Disc
GVS Nylon 66 (NY) Membranes are hydrophilic and available in pore sizes from 0.1 to 5.0 μm.
UltraSep™ 90 mm Polyethersulfone Disc
Constructed from a high-temperature polyethersulfone polymer that is acid and base resistant. Its strength and durability are advantageous during usage that involves aggressive handling or automated equipment. It's naturally hydrophilic w/o added wetting agents and has low extractables.
GVS PCTE Filter Membranes: Plain Hydrophilic
Smooth, flat surface for even distribution in a single plane.
GVS Regenerated Cellulose (RC) Membrane
GVS Regenerated Cellulose (RC) Membranes available with pore sizes in 0.22 μm or 0.45 μm.
GVS Polyethersulfone (PES) Membrane, Disc
GVS Polyethersulfone (PES) Membranes are hydrophilic and available in pore sizes from 0.03 to 8.0 μm.