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™ 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
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
Cytiva Whatman™ Non-Sterile Cellulose Nitrate Membranes
Narrow pore size distribution for improved surface capture and analysis.
Cytiva Whatman™ Sterile Mixed Cellulose Ester Gridded Membranes
Composed of cellulose acetate and cellulose nitrate.
Cytiva Whatman™ Mixed Cellulose Ester Membranes
Color contrast helps easier particle detection.
Cytiva Whatman™ Cyclopore PC Polycarbonate Membrane Filters
Microporous membranes featuring sharp cut-off and reproducible lab microfiltration characteristics of track-etched membrane filters
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™ 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.
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.
Cytiva Whatman™ ME 25 Plain Mixed Cellulose Ester Membranes
Facilitates the counting process and minimizes eye fatigue with color contrast between the surface and the colonies. Whatman™ ME 25 Plain Mixed Cellulose Ester Membranes are characterized by a smooth and more uniform surface.
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.
Sartorius Microsart™ @Filter 100 in Bags
Membrane filters suitable for use in the Microsart @Filter units
Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters: 0.2μm
Ensure quality control in routine microbiological filtering. Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters, 0.2μm are single-packed membranes with black grids for colony counting, particle testing and microscopy. The 0.2μm pore size is BCT validated. Choose from two diameters and packaging quantities.
Sartorius Microsart™ e.motion Membrane Filters
For colony counting, particle testing and microscopy. Specifically designed for use in the Microsart™ e.motion dispenser, the filters are individually sterile-sealed in a format packaged on a pleated band, without protective paper. Can also be used with Sartorius nutrient pad sets.