What is the membrane made of in DNA purification kits - (Sep/03/2013 )

is it silica or cellulose acetate

Depends on the kit - Promega's wizard kits had diatomaceous earth (essentially silicon dioxide) as the filter, but other kits use formulations of glass.  I don't know if there are any that use cellulose acetate, but there could well be.

bob1 on Tue Sep 3 20:30:53 2013 said:

Depends on the kit - Promega's wizard kits had diatomaceous earth (essentially silicon dioxide) as the filter, but other kits use formulations of glass.  I don't know if there are any that use cellulose acetate, but there could well be.

These are the cellulose acetate columns I was referring to

http://www.sigmaaldrich.com/catalog/product/sigma/cls8160?lang=en&region=US

Those are filters. I don't think they bind DNA effectively. You could use them with diatomaceous earth or silica which is filtered by them.