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
GVS AcetatePlus™ 47 mm Cellulose Acetate Disc
Cellulose acetate is a supported, hydrophilic membrane that is naturally low binding. Available from 25 mm to 293 mm. It is ideal for filtration applications where maximal recovery of protein is critical.
GVS Magna™ 293 mm Nylon Disc
A supported, naturally hydrophilic membrane designed to wet out evenly and retain its superior strength during use in general filtration or medical assays.
GVS PCTE Filter Membranes: Plain Black for Epifluorescence
Treated to appear dark gray—ideal for epifluorescence microscopy
GVS AcetatePlus™ 142 mm Cellulose Acetate Disc
Cellulose acetate is a supported, hydrophilic membrane that is naturally low binding. Available from 25 mm to 293 mm. It is ideal for filtration applications where maximal recovery of protein is critical.
GVS Magna™ 13 mm Nylon Disc
A supported, naturally hydrophilic membrane designed to wet out evenly and retain its superior strength during use in general filtration or medical assays.
GVS MicronSep™ Black Nitrocellulose Disc
Mixed cellulose esters (MCE) filtration membrane is an unsupported, hydrophilic membrane. Its rapid flow rate and high throughput make it ideal for use in diagnostic kit manufacturing applications.
GVS Magna™ 37 mm Nylon Disc
A supported, naturally hydrophilic membrane designed to wet out evenly and retain its superior strength during use in general filtration or medical assays.
GVS Magna™ 47 mm Nylon Disc
A supported, naturally hydrophilic membrane designed to wet out evenly and retain its superior strength during use in general filtration or medical assays.
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 Magna™ 142 mm Nylon Disc
A supported, naturally hydrophilic membrane designed to wet out evenly and retain its superior strength during use in general filtration or medical assays.
GVS PTFESep™ 142 mm Polytetrafluoroethylene Disc
Polytetrafluoroethylene polymer (PTFE) laminated to a polypropylene support for improved durability and easy handling. These filters are chemically compatible with strong acids and most aggressive solvents such as alcohols.
GVS Laminated PTFE Membranes
Naturally hydrophobic, plain white membranes
GVS AcetatePlus™ 13 mm Cellulose Acetate Disc
Cellulose acetate is a supported, hydrophilic membrane that is naturally low binding. Available from 25 mm to 293 mm. It is ideal for filtration applications where maximal recovery of protein is critical.