Anita, >From your description, you most likely are looking for a prefilter6000.
http://www.gelifesciences.com/webapp/wcs/stores/servlet/productById/en/GELifeSciences/18458201 Scott Scott D. Pegan, Ph.D. Associate Professor Pharmaceutical and Biomedical Sciences College of Pharmacy University of Georgia 240 W. Green St. Athens, GA, USA, 30602 phone: 706-542-3435 On Tue, Sep 16, 2014 at 4:29 AM, Anita P <crystals...@gmail.com> wrote: > Hi All, > Sorry for this off topic. > > I have heard that there are these little columns called guard columns > which can be attached to AKTA purifiers. These columns prevent the incoming > huge aggregates to be deposited and blocking of the gel filtration columns. > > Can any one advice me regarding where to purchase these columns. I could > not find them in GE website. We have Superdex 16/60 on AKTA purifier. > > Thanks in advance. > Have a good day > > Anita >