Filtration Membrane Discs
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
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Filtered Search Results
Cytiva Whatman™ Type WCN Cellulose Nitrate Membranes
Recommended for majority of routine applications, this membrane is manufactured under strictly controlled conditions. Whatman™ Type WCN Cellulose Nitrate Membranes narrow pore size distribution for improved surface capture and analysis.
Color | White |
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Material | Cellulose Nitrate |
Autoclavable | Autoclavable |
Cytiva Whatman™ Mixed Cellulose Ester Membrane Filters
Whatman™ Mixed Cellulose Ester Membrane Filters are biologically inert and offers high degree of internal surface area for greater product adsorption.
Material | MCE |
---|---|
Autoclavable | Autoclavable |
Sterility | Sterile |
Cytiva Whatman™ Nylon Membranes
Flexible and durable for easier handling. Cytiva Nylon Membranes are naturally hydrophilic, eliminating need for wetting agents and prewetting when filtering aqueous solutions.
Material | Nylon |
---|---|
Hydrophobicity | Hydrophilic |
Autoclavable | Autoclavable |
Cytiva Whatman™ Nuclepore Hydrophilic Membrane
Nuclepore track-etched hydrophilic membranes with highly defined pore size cutoff in sub-micron range
Type | Nuclepore hydrophilic membrane |
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Material | Polycarbonate |
For Use With (Application) | Bioassays, Cell biology, Environmental analysis, Microscopy, Cytology, Parasitology, Certain air and oceanography analyses |
Cytiva Whatman™ Sterile Mixed Cellulose Ester Gridded Membranes
Composed of cellulose acetate and cellulose nitrate.
Cytiva Whatman™ Polyamide Membranes
Universal filter made from pure polyamide for clarification and sterile filtration
Thickness (Metric) | 110 μm |
---|---|
Material | Polyamide (Nylon) |
Hydrophobicity | Hydrophilic |
Cytiva Whatman™ Regenerated Cellulose Membranes: Grade RC 58
Consists of pure cellulose without any wetting agents
Thickness (Metric) | 75 μm |
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Pore Size | 0.2 μm |
Material | Regenerated Cellulose |
Hydrophobicity | Hydrophilic |
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.
Thickness (Metric) | 135 μm |
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Includes | Interleaving paper |
Pore Size | 0.2 μm |
Bubble Point | 3.7bar |
Flow Rate | 20s/100mL/12.5cm2 |
Grid Color | Plain |
Material | MCE |
Autoclavable | Autoclavable |
Membrane Type | ME24 |
Cytiva Whatman™ Cellulose Acetate Membranes
Prepares liquid scintillation cocktail for scintillation counter measurements. Whatman™ Cellulose Acetate Membranes are highly heat resistant and can filter hot liquids and hot gases.
Material | Cellulose Acetate |
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Hydrophobicity | Hydrophilic |
Cytiva Whatman™ 47 mm 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.
Flow Rate | High |
---|---|
Diameter (Metric) | 47 mm |
Material | Nucleopore Polycarbonate |
Hydrophobicity | Hydrophilic |
For Use With (Application) | Epifluorescence microscopy, environmental analysis, cell biology |
Cytiva Whatman™ Cyclopore PC Polycarbonate Membrane Filters
Microporous membranes featuring sharp cut-off and reproducible lab microfiltration characteristics of track-etched membrane filters
Type | Membrane filters |
---|---|
Temperature (English) Operating | 284 °F |
Pore Density | Min: 105 pores/cm2, Max: 6 x 108 pores/cm2 |
Quantity | 100 Pk. |
Material | Polycarbonate |
Porosity | Min: 4%, Max: 20% |
Temperature (Metric) Operating | 140 °C |
For Use With (Application) | For general filtration, Cross-flow filtration, Air and water monitoring, Microorganism analysis, Healthcare applications, Immunodiagnostics |
Autoclavable | Autoclavable |
Cytiva Whatman™ Polyester Drain Discs
Provides a flat surface to eliminate filter tearing or rupturing. Whatman™ Polyester Drain Discs are used to support membrane filters. They are available in a variety of diameters for use in a range of devices.
Thickness (Metric) | 100 μm |
---|---|
Material | Polyester |
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.