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 Cellulose Acetate Membrane Filter
Cellulose acetate membrane filters with 293 mm diameter combine thermal stability with exceptionally low adsorption characteristics.
Cytiva Whatman™ Nylon Membrane Circle
For filtering aqueous solutions and most organic solvents
Cytiva Nucleus Membrane
Made from polycarbonate film, for precision analysis of track-etched manufacturing
MilliporeSigma™ MF-Millipore™ Membrane Filter, 1.2 μm, Gridded
Mixed cellulose esters (MCE) membrane, hydrophilic
GVS Nitrocellulose-Mixed Esters of Cellulose Membrane Filters
Uniform microporous structure has low extractables, low ash
GVS Supported Cellulose Acetate Membranes
Pure cellulose acetate impregnated on nonwoven support
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 Laminated PTFE Membranes
Naturally hydrophobic, plain white membranes
GVS Poretics™ 47 mm Black Polycarbonate Disc
Made from a thin, microporous polycarbonate film material. It is ideally suited for use in blood assays and high-purity and general filtration. Though polycarbonate is hydrophobic, the membrane is treated with a wetting agent to make it hydrophilic.
GVS MicronSep™ Black Nitrocellulose Disc with Grid
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 Silver Disc Membrane
Silver membranes are composed entirely of 99.97% pure metallic silver. They provide excellent chemical resistance and high temperature characteristics.
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.
GVS AcetatePlus™ 90 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.