?Membranes that can be dissolved?

[RAYMOND CHAWLA (BIOCHEMISTRY) PG]

Hi,

Would anybody know of a company that sells membranes which can be 
used to filter a water sample so as to trap any cells present (but 
not endogenous DNA, etc) and then dissolved thereby releasing the 
aforementioned cells?

Many thanks for any information you might have,

Raymond

rchawla at ollamh.ucd.ie

PS. I am based in Dublin, Ireland so if there is a European 
distributor that would be appreciated.