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
Ace Glass, Inc. 37mm quartz graded seals for connecting Pyrex or Kimax borosilicate glass to Quartz glass. Quartz length is 7.6cm, and borosilicate length is 10.2cm.
37mm quartz graded seals for connecting Pyrex or Kimax borosilicate glass to Quartz glass. Quartz length is 7.6cm, and borosilicate length is 10.2cm.
Analytical Sales & Services MWCO Micro Spin Filters, 800µL Volume, PVDF 30,000 with 2.0ml Receiver Tubes
MWCO Micro Spin Filters, 800µL Volume, PVDF 30,000, with 2.0mL Receiver Tubes (Non-Sterile)
Grainger Membrane Filter 47 mm 0.45 um PK600
The LabExact Membrane Filter is a 47mm diameter hydrophilic polyethersulfone membrane filter with 0.45μm pore size. It has low protein binding and is compatible with aqueous and organic solvents. The polyethersulfone membrane is sterilized by gamma irradiation. This filter is well-suited for analytical sample preparation including HPLC mobile phase filtration and clarification and sterilization of aqueous and organic solutions. It has a high flow rate and loading capacity. The polyethersulfone construction provides thermal, chemical and mechanical stability.
Grainger Membrane Filter 47 mm 0.45 um PK1000
The Grainger 14A849 Glass Microfiber Filter, 1.6 μm, 5.5 cm Diameter, Pack of 100 is a pack of 100 glass microfiber filters with a pore size of 1.6 microns and a diameter of 5.5 cm. These high-quality binder-free borosilicate glass filters are designed for a variety of laboratory filtration applications including HPLC sample preparation, IC sample filtration, solvent filtration and air monitoring. Their low metal extractables make them ideal for trace metal analysis. The filters have >98% particle retention down to their rated pore size.
Sigma Aldrich Fine Chemicals Biosciences mPEG40K MAL average Mn 4001G
Methoxy PEG Maleimide. Selective for thiol groups on cystein side chains reacts at pH 5.0-6.6
Tisch Scientific Polypropylene Membrane Filters, 0.45um, 25mm, Nonsterile, 200 per pack
Polypropylene Membrane Filters, 0.45um, 25mm, Nonsterile, 200 per pack
Microsolv Technology Corporation Filters, Membrane, 25mm, 0.45um, PTFE. Round, 100/PK.
These Polytetraflouro ethylene (PTFE) have a polypropylene support. Advanced Quality (AQ) Brand, PTFE Filter Discs can be used with any device when membrane filtration is desired.Hydrophobic or water resistant membranes with minimal extractables and absolute retention, PTFE is chemically resistant to acids and bases and will not degrade with Normal Phase HPLC Solvents. They can be autoclaved at 121⁰C for 30 minutes or EO sterilization without damage to the integrity or performance of the filter. Diameter: 25mm Max Operating Temperature: 250⁰C Pore Size: 0.45 um