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™ 3 μm Pore Size (ME 29) Mixed Cellulose Ester Membranes, Plain
Whatman™ (ME 29) Mixed Cellulose Ester Membranes, Plain are particularly effective in applications requiring higher flow rates and larger volume filtration including clarification or sterilization of aqueous solutions, particulate analysis and removal, air monitoring, and microbial analysis.
Cytiva Whatman™ 0.6 μm Pore Size (ME 26) Mixed Cellulose Ester Membranes, Plain
Whatman™ (ME 26) Mixed Cellulose Ester Membranes are particularly effective in applications requiring higher flow rates and larger volume filtration, including clarification or sterilization of aqueous solutions, particulate analysis and removal, air monitoring, and microbial analysis.
MilliporeSigma™ S-Pak™ Sterile Membrane Filter Kit
Made from mixed esters of cellulose and have been optimized for MF method microbiological analysis of water or other liquids
Sartorius Environmental Air Monitoring Gelatin Membranes
Collect airborne microbes and viruses. Sartorius Environmental Air Monitoring Gelatin Membranes guarantee reliable and accurate results. They are sterile and water soluble with a high retention rate. Choose from a range of sizes in single-wrapped disposable filters with holders or packs of filter disks.
Cytiva Whatman™ Polyamide Membranes
Universal filter made from pure polyamide for clarification and sterile filtration
Cytiva Whatman™ 1.2μm Pore Size (ME 28) Mixed Cellulose Ester Membranes
Cytiva Whatman 1.2um Pore Size (ME 28) Mixed Cellulose Ester Membranes, Diameter Filter: 47mm, Pore Size: 0.2um
MilliporeSigma™ PVC Membrane Filters, 5 μm
For air monitoring applications to analyze silica, carbon black or quartz particulates
MilliporeSigma™ Omnipore™ Membrane Filters, 0.45 μm
Hydrophilic PTFE polymer membrane filter compatible with virtually all solvents, acids, and alkaline solutions. Omnipore™ Membrane Filters are biologically and chemically inert.
MilliporeSigma™ 13mm Membrane Filter
Biologically inert mixture of cellulose acetate and cellulose nitrate
Cytiva Whatman™ Nuclepore™ Hydrophilic Membrane
A highly defined pore size cutoff in the sub-micron range enables particle deformity measurements, and the capture of extremely small particles
MilliporeSigma™ Fluoropore™ Membrane Filter for Filtration of Solvents
The Fluoropore™ membrane filter is a hydrophobic, polytetrafluoroethylene (PTFE) polymer membrane bonded to a high density polyethylene support to improve filter handling characteristics for normal applications.
DWK Life Sciences DURAN™ Sintered Glass Filter Discs
DURAN™ Sintered Glass Filter Discs feature a non-fused edge, centered placement, and untreated surfaces, making them suitable for reliable laboratory filtration applications with DURAN™ borosilicate glass quality.
MilliporeSigma™ MF-Millipore™ Membrane Filter, 0.3 μm
Mixed cellulose esters (MCE) membrane, hydrophilic
MilliporeSigma™ Omnipore™ Membrane Filters, 0.45 μm
Hydrophilic PTFE polymer membrane filter compatible with virtually all solvents, acids, and alkaline solutions. Omnipore™ Membrane Filters are biologically and chemically inert.