Bottle top filters and sterile receivers aid the researcher in preparing sterile solutions for their work. For example cell culture media must be prepared sterile. Many different membrane materials are available including Nylon, Cellulose Acetate, Cellulose Nitrate, and Polyether Sulfone (PES). Pore sizes available range from 0.2um to 0.8um. Various receiver volumes are available from 115ml to 1L. These tools for sterile prep can be purchased separately or as complete units. If a lab has limited access to an autoclave or if a microbiology class only has a few lab classes requiring sterile media preparation, these filtration units are the answer to efficient sterile filtration. Nalge Nunc, Whatman, Pall, Greiner Bio-One, and VWR all offer sterile filtration units in various volumes, materials, and pore sizes.
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