Selecting a Syringe Filter on Amazon.com
A syringe filter is used in scientific laboratories to remove particulates from a small volume of liquid prior to analysis or cell culture. It works in conjunction with a syringe, which uses pressure to draw aqueous solutions through the filter. A disc-shaped or hexagonal plastic housing contains the filter and has inlet and outlet hose barbs on each side to connect to tubing. Ranging in diameter from 4 to 30mm, a syringe filter may be color coded to indicate the type of filter membrane within the housing. Membranes include PTFE (polytetrafluoroethylene), PES (polyethersulfone), PVDF (polyvinylidene difluoride), polypropylene, nylon, cellulose, or glass to suit the filtration application. Pore sizes range from 0.02 to 5μm. Syringe filters may be sterile, and are used in biological, pharmaceutical, food and beverage, and environmental applications including sample filtration for high-performance liquid chromatography (HPLC), biological cell preparation, ion chromatography, protein analysis, and other filtration applications. Manufacturers of syringe filters include Whatman.