What membrane filter pore size should I use for sterilization, and whats the pore size of my fiber prefilter?

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What membrane filter pore size should I use for sterilization, and whats the pore size of my fiber prefilter?

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• Regardless of the material, always use a 0.2-um pore size membrane filter as the final filter for any sterilization filtration. • Fiber prefilters do not actually have a measurable pore size rating because they are depth filters. We rate the prefilters with a relative retention of about 1.0-um size particles for general purpose prefiltration applications.