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
Tisch Scientific MCE Membrane Filters
Tisch MCE membrane filters are developed from a mixture of cellulose acetate and cellulose nitrate and are one of the most widely used filters in both air monitoring and analytical applications. These filters are gridded for microbial cell counting and particle detection.
Ace Glass, Inc. 90mm straight tubes with 25-50 micron fritted discs, for construction of special apparatus.
90mm straight tubes with 25-50 micron fritted discs, for construction of special apparatus.
Ace Glass, Inc. Vacuum trap inner tube only, 24mm OD, #15 Ace-Thred side arm
Vacuum trap inner tube only, 24mm OD, #15 Ace-Thred side arm
YSI 3P LifeScience Methanol Membranes, 4 each
Methanol Membranes. Used to measure methanol on YSI 2900 Series Analyzers.
Andwin Scientific SUPOR 450 PES .45U 47MM 100/PK
The Supor Membrane Disc Filter has a pore size of 0.45 m and a diameter of 47 mm. This product has a hydrophilic polyethersulfone membrane that features high flow rate, low protein binding, and low extractables. It is stronger than other types of membranes, namely acetate and nitrate. This product also features a very high water flow fluid filtration capacity. This is sold in a pack of 100.
Structure Probe Inc PC GOLD CTD MEM FLTR 0.8UM 10P
polycarbonate gold coated membrane filters, 0.8um pore size, 25mm diam 10/pk
SIGMA ALDRICH FINE CHEMICALS BIOSCIENCES S-PAK FLTR MEMBRANE 47MM
NC2110658 S-PAK FLTR MEMBRANE 47MM
Tisch Scientific Nylon Membrane Filter, 10.0 µm, 47 mm, Nonsterile, 200 Pack, SF14756
Tisch nylon membrane filters are naturally hydrophilic, have high non-specific binding properties, and an extractable level of <0.0015 mg/cm^2, they are ideal for HPLC solvent and sample preparation.