Filtration of virus: help needed

[Stephane Bourget]

Hello.

I'm presently working on a protocol involving concentration of bacteriophage 
from water samples by filtration on a positively charged membrane 
filter (adsorption). I have difficulty finding such a product. My references 
cite Virosorb by Cuno. Do any of you ever encountered difficulty working this 
method on a coliphage such as MS2? Any help would be greatly appreciated.
Thank you.

Stephane Bourget
hbiotech at interlink.net