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
Cytiva Whatman™ Polyethersulfone (PES) Membrane Filters
Whatman polyethersulfone (PES) membrane filters from Cytiva’s Life Sciences business are hydrophilic and stable in alkaline pH, making them suitable for biological samples and aqueous applications.
MilliporeSigma™ Nylon Net Filters, 0.8 μm
Hydrophilic nylon membrane
Cytiva Whatman™ 76mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 76mm 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™ 19mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 19mm 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 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™ 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™ PVP-Free Polycarbonate Hydrophobic Cell Culture Membrane
Manufactured from high-quality polycarbonate film. Whatman™ PVP-Free Nuclepore Hydrophobic Membranes have sharply defined pore sizes, high flow rates and excellent chemical and thermal resistance.
Spectrum™ Spectra Mesh™ Woven, Polyester Filters
Consist of individual strands woven into a mesh screen
Cytiva (Formerly Pall Lab) GN-6 Metricel MCE Membrane Disc Filters - 85 mm, grid, gamma-irradiated (not individually packed) (50/pkg)
The GN-6 membrane is 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.-For microbiological analysis-Mixed cellulose ethers-Easy bacterial quantificationIdeal for isolation and enumeration of total and fecal coliforms, Ecoli, fecal Streptococcus, fungi, and other heterotrophic bacteria.GN-6 grids have a unique dot grid pattern that provides easy quantification of bacterial colonies without growth inhibition or enhancement. GN-4 membranes dissolve completely using standard digestion procedures, and clear completely for minimal interference in fiber counting.Ordering information: GN-6 is available gamma irradiated, individually packaged (except filter model 60016) or nonsterile, bulk packed. This product is not approved for use in medical, clinical, surgical or other patient applications.
GLOBAL LIFE SCIENCES SOLUTIONS USA LLC SENTINO DISP ME25 .45UM 1000PK
502538113 SENTINO DISP ME25 .45UM 1000PK
Cytiva (Formerly Pall Lab) PTFE Membrane Disc Filters - 2 m, 47 mm (50/pkg)
Strong, Chemically Resistant Membranes for Air Monitoring and Sampling in Aggressive EnvironmentsLow chemical background permits highly sensitive, interference-free determinations.Ensures accurate gravimetric determinations with low tare mass.Ideal for filtration of gas and/or organic solvents. This product is not approved for use in medical, clinical, surgical or other patient applications.
Hach Company Filter Membrane, 47-mm, 0.45-microns, 100pk
Filter Membrane, 47-mm, 0.45-microns, 100pk
Hach Company Filter, Extra Thick, 25 mm diameter, for OriFlo Filter Holder, pk/100
Designed for rapid, qualitative filtration of particulate matter from aqueous samples using a 25 mm glass fiber filter or other medium with porosity ≥ 1.0 μm (micron). Used in Hach Method 10014 for Ultra Low Range Chlorine in Wastewater (EPA Accepted method).