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
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 13mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 13mm, 100/Pk
Thomas Scientific Prefilters, 5uM GMF, 47mm, 50/Pk.
ValuSep 5um Glass Micro Fiber (GMF) prefilters are made of two separate layers of glass fiber in a very thin format for highly efficient capture and retention of particles that could prematurely clog an SPE filter.
Sigma Aldrich Fine Chemicals Biosciences Nylon Membranes positively
Microporous nylon 66 membrane on a polyester support carrying positively charged (pH 3 - 10) Aquaternary ammonium groups.Surface Properties Pore size of A0.45mum
Grainger Membrane Filter 47 mm 0.45 um PK200
The LabExact Membrane Filter is a 47mm diameter hydrophilic polyethersulfone membrane filter with 0.45μm pore size. It has low protein binding and is ideal for analytical sample preparation including HPLC. The polyethersulfone membrane is compatible with most solvents. These sterile filters have a high flow rate and loading capacity. They can be used for aqueous and organic solutions. The maximum operating temperature is 70°C at 35 psi. Each filter has a 47mm diameter. Boxes contain 100 filters individually sealed in peel-open pouches.
Cole-Parmer PTFE Membrane, 13 mm, 0.2 m, 100/pk
Durable laminated PTFE membranes are unaffected by even the most corrosive compounds, including concentrated acids, alkaline, and propellants. Membranes withstand temperatures from –100 to 130C (–148 to 266F). Use these hydrophobic membranes for sterile venting and filtration of gas, air steams, and organic solvents. Prewet with acetone or methanol for aqueous solutions.
Alkali Scientific CellPro™ DEPC Treated Ultra Pure Water, 500mL
DEPCTreated Water,Certified Nuclease Free, sterile, 500mL x 10 Bottles / Case
Sterlitech Corporation Polycarbonate (PCTG) Gold-Coated Membrane Filters, 0.8 Micron, 40/20nm Coating, 13mm, 10/Pk
Polycarbonate (PCTG) Gold-Coated Membrane Filters, 0.8 Micron, 40/20nm Coating, 13mm, 10/Pk