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
Azzota Corp MPF CN-CA 50mm 0.22u 100pk
Microporous Filter CN-CA Diameter 50mm Pore Size 0 22um 100/pk
Azzota Corp MPF CN-CA 50mm 0.80u 100pk
Microporous Filter CN-CA Diameter 50mm Pore Size 0 80um 100/pk
Meissner ALpHA G Hydrophilic Polyester Microfiber Filter
Meissner ALpHA G Hydrophilic Polyester Microfiber Filter, 47mm Disc, 10µm, 12.4cm² EFA, Non-Sterile
Analytical Sales & Services MWCO Micro Spin Filters, 800µL Volume, PVDF 30,000 with 2.0ml Receiver Tubes
MWCO Micro Spin Filters, 800µL Volume, PVDF 30,000, with 2.0mL Receiver Tubes (Non-Sterile)
Cole-Parmer Spectra/Mesh 148145 Screen Discs, 47 mm, Nylon, 100 µm, pack of 10
There are four material options to choose from. The nylon mesh filters out particles down to 8 µm. These are ideal for finer macrofiltration needs and are suitable with all aqueous solutions. Polypropylene (PP) mesh offers strength and stability, while also being resistant to most acids, alkalies, and alcohols. These screens are autoclavable. The PEEK mesh holds its shape and features superior chemical resistance. These are ideal for general filtration, are resistant to acidic and alkaline solutions, and feature temperature stability up to 250°C. The 304 Stainless Steel woven discs or sheets are ideal for high differential pressure applications as they are durable and feature extra strength.
Cytiva Whatman™ 47mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 47mm Nuclepore™ Polycarbonate Hydrophilic Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.
Cytiva Whatman™ Nuclepore™ Black Polycarbonate Membranes
Reduces background fluorescence in support of epifluorescence microscopy. Whatman™ Nuclepore™ Black Polycarbonate Membrane Filters improve visibility and help to distinguish microorganisms from other particulates.
Cytiva Whatman™ Nuclepore Track-Etched Polycarbonate AOX Membranes
GE’s Nuclepore filters are manufactured from high-quality polycarbonate film, with sharply defined pore sizes and high flow rates for reproducible AOX analysis.
Cytiva Whatman™ Cyclopore™ Polycarbonate Black Membrane Filters
Provides a contrast background for epifluorescence and other microscopy applications. Whatman™ Cyclopore™ Polycarbonate Black Membrane Filters improve test sensitivity with low background fluorescence.
Cytiva Whatman™ 25mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 25mm Nuclepore™ Polycarbonate Track-Etched Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.
Cytiva Whatman™ 13mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 13mm Nuclepore™ Polycarbonate Hydrophilic Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.
Cytiva™ Whatman™ RC55 Regenerated Cellulose (Cellulose Acetate) Filtration Membranes
Whatman™ RC55 Regenerated Cellulose Filtration Membranes provide broad chemical compatibility and can be used with aqueous solutions or organic solvents. With low extractable and low binding properties they are ideal for sample preparation/mobile filtration in HPLC and with protein-containing solutions.
Cytiva Whatman™ 90mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ Polycarbonate Hydrophilic Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.
Cytiva Whatman™ Black Cyclopore™ Membranes
For use with epifluorescence microscopy and applications requiring contrasting background.