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™ Regenerated Cellulose Membranes: Grade RC 58
Consists of pure cellulose without any wetting agents
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.
Cytiva Whatman™ Polyamide Membranes
Universal filter made from pure polyamide for clarification and sterile filtration
Cytiva Whatman™ Polydisc In-line Filter
For serum samples
Sartorius Gridded Sterile Cellulose Nitrate Membrane Filters
Membrane Filters for Colony Counting, Particle Testing and Microscopy - Cellulose nitrate (cellulose ester), gridded, individually, sterile packaged
Cytiva Nucleus Membrane
Made from polycarbonate film, for precision analysis of track-etched manufacturing
Cytiva Whatman™ Regenerated Cellulose Membranes: Grade RC 55
Consists of pure cellulose without any wetting agents.
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.
Sartorius™ 11304 Series Non-Sterile Cellulose Nitrate (CN) Membrane Filters
11304 Series Non-Sterile Cellulose Nitrate (CN) Membrane Filters are hydrophilic, have high flow rates thanks to their symmetrical structure and are compatible with aqueous solutions (pH 4 – 8), hydrocarbons, and several other organic solvents.
Cytiva Whatman™ Nuclepore™ Polycarbonate Hydrophilic Membranes
Suitable for a wide range of sample types and applications including bioassays, cell biology, and environment analysis
Sartorius Stedim Biotech™ Microsart™ e.motion Cellulose Nitrate Membrane Filters, Gridded, Black/White, 0.45μm, High-Flow
Sartorius Stedim Biotech™ Microsart™ e.motion Cellulose Nitrate Membrane Filters, Gridded, Black/White, 0.45μm, High-Flow are designed for the e.motion dispenser and feature gridlines for reliable quantification and identification.
Sartorius Stedim Biotech™ Microsart™ e.motion Cellulose Nitrate Membrane Filters, Gridded, White/Black, 0.45μm, High-Flow
Sartorius Stedim Biotech™ Microsart™ e.motion Cellulose Nitrate Membrane Filters, Gridded, White/Black, 0.45μm, High-Flow are designed for the e.motion dispenser and feature gridlines for reliable quantification and identification.
Sartorius Hydrophobic Edged Nonsterile Cellulose Nitrate and Acetate Membrane Filters
The non-sterile membrane filters are made of cellulose nitrate (cellulose mixed ester), cellulose acetate or regenerated cellulose. They can be used for colony counting, particle testing and microscopy. Choose between gridded or non-gridded, membranes, either with or without hydrophobic edge.