Centrifugal filters (sterile)

BL lo1 at ntlworld.com
Tue Mar 19 17:51:16 EST 2002

Does anyone know if centrifugal filters with cut offs of 0.22 micron and
0.45 micron exist? Ideally they would be like mini-prep cartridges with a
filter membrane of 0.22/0.45 microns. I had a look at Millipore 's website
but they don't do them. I want to use these because I want to filter small
volumes (up to 2-3mLs) and I would lose too much by using syringe filters
(dead volume). Preferably supplied sterile. Thanks.

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