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, 0.2 Micron, 13mm, 100/Pk
Polycarbonate (PCTE) Membrane Filters, 0.2 Micron, 13mm, 100/Pk
MDI Membrane FLTR MDI CN 47MM 0.2 EO 100PK
mdi Cellulose Nitrate membrane filters, 47 mm, 0.2 µm, EO-sterile, 100 PK
Microsolv Technology Corporation Filters, Membrane, 47mm, 0.45um, PVDF. Round, 100/PK.
These high flow, non media migrating, Polyvinylidene Fluoride (PVDF) Advanced Quality (AQ) Brand, Filter Discs can be used with the Mobile Phase Filter Degasser Assembly or any device when membrane filtration is desired.Hydrophilic, they are low protein binding and can be autoclaved at 121⁰C for 30 minutes or EO sterilization without damage to the integrity or performance of the filter. Diameter: 47mm Max Operating Temperature: 80⁰C Bubble Point: 30psi (2.10 kg/cm2) Water Flow Rate: 30ml/min/cm2 @ 10 psi, 27⁰C Thickness: 135um +- 15um Extractables with WFI (water): Within USP Limits Oxidizable Substances: Passes USP Test Pore Size: 0.45 um
Microsolv Technology Corporation Mobile Phase Filter, 2um, Last Drop™, PTFE, Tripod Tubing Connector. 1 EA.
These Last Drop, PEEK and Polypropylene Mobile Phase Filters are manufactured with a 2.5um PTFE Filter Element and will provide the highest filter capacity and throughput while using a maximum amount of solvent. The unique design allows for this flat filter to "vacuum" up to the "last drop of liquid" in the reservoir bottle. The all PEEK, Tripod Tubing Connecotr allows for the inlet tubing of the mobile phase delivery system to slip over it with 1/16" or 1/8" low pressure tubing. No ferrules or nuts are required to apply tubing. The 2.5um pore size Element will filter undissolved particles from your solvents that are 2.5um or larger preventing them from damaging your HPLC pumps, columns or instrument. Install these filters directly in your mobile phase bottles.
Sterlitech Corporation Nylon Membrane Filters, 5.0 Micron, 47mm, 100/Pk
Nylon Membrane Filters, 5.0 Micron, 47mm, 100/Pk
SCP Science DigiFILTER 1.0 Micron, 98% Particle Retention, Vacuum-Assisted Filtration, 100/PK
The DigiFILTER 1.0 micron is designed for efficient filtration of wastewater, soil, and other challenging samples, enhancing laboratory productivity by preventing clogging and ensuring sample integrity for trace metal analysis. Its hydrophilic Teflon membrane guarantees 98% particle retention, making it ideal for high-throughput processing. This vacuum-assisted assembly is compatible with 50 mL tubes, providing a reliable solution for clean sample preparation in analytical applications.
MDI Membrane FLTR MDI GCN 47MM .45 EO 100PK
mdi grid marked Cellulose Nitrate membrane filters, 47 mm, 0.45 µm, EO-sterile, 100 PK
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.05 Micron, 25mm, 100/Pk
PCT00525100 - Polycarbonate (PCTE) Membrane Filters, 0.05 Micron, 25mm, 100/Pk
Waters Corp Solvent Filter, PTFE, 47 mm, 0.2 µm, Non polar, 100/pk
This PTFE membrane is a good choice for use with aggresive organic solvents
Cytiva Whatman™ Cyclopore™ Polycarbonate Black Membrane Filters
Provides a contrast background for epifluorescence and other microscopy applications. Whatman™ Cyclopore™ Polycarbonate Black Membrane Filters improve test sensitivity with low background fluorescence.
Cytiva Whatman™ Nuclepore™ Polycarbonate Hydrophilic Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ Polycarbonate Hydrophilic Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.
Cytiva Whatman™ 47mm Nuclepore™ Polycarbonate Track-Etched Membranes
Manufactured from high-quality polycarbonate film and track-etched for high pore size precision. Whatman™ 47mm Nuclepore™ Polycarbonate Hydrophilic Membranes combine high flow rates and chemical and thermal resistance with sharply defined pores, making them suitable for microscopy, cytology, parasitology, and certain air and oceanography analyses.