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
Alkali Scientific ProCycle™ Pre-cut Sealing Membranes, Non-Sterile, for ELISA plates, 10 bags of 10 membranes
RNase, DNase, DNA, and PCR inhibitor free Evaporation rates ≤ 5% Inner packs of 10 membranes PureAmp™ Sealing Membranes are compatible with all standard PCR plates. Membrane options include pierceable aluminum, standard transparent, optically clear sticky adhesive, optically clear pressure-sensitive adhesive, and low-adhesive EZ-peel, all of which are guaranteed to keep evaporation rates below 5%.
Ace Glass, Inc. 0.510" 105 micron polypropylene filter for #15 threaded adapters. Pkg/12.
0.510" 105 micron polypropylene filter for #15 threaded adapters. Pkg/12.
Perkin Elmer US LLC Trap Filter Discs, Pkg. 10
For use with PerkinElmer TurboMatrix Thermal Desorption Instruments.
Sterlitech Corporation EVONIK FLT SH MEMB PU 47MM 5PK
Evonik Flat Sheet Membrane, Puramem Selective, NF, 47mm, 5/pk
Microsolv Technology Corporation Filter Memb .22 Ptfe 47Mm 100P
Filters, Membrane, 47mm, 0.22um, PTFE. Round, AQ Brand. 100/PK.
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. Fritted disc, 25mm OD, porosity A (145-174 micron), fits3700-10
25mm O.D. Porosity A (145-174 micron) fritted disc.
Sterlitech Corporation Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 25mm, 100/Pk
PCT00325100 - Polycarbonate (PCTE) Membrane Filters, 0.03 Micron, 25mm, 100/Pk