High recovery Ultracel regenerated cellulose membrane in a range of molecular weight cut-offs High retentate recovery of greater than 90% Vertical membrane reduces concentration polarization for ultra-fast spin times (as fast as 10–15 minutes) Heat-sealed membrane minimizes downstream extractables 100% integrity tested for reliable performance Convenient sample monitoring with translucent housing and volume gradations Direct pipettor sample access eliminates processing step to recover concentrate High concentration factors of 80–100XApplications:Concentration of biological samples containing antigens, antibodies, enzymes, nucleic acids, or microorganisms Purification of macromolecular components found in tissue culture extracts or cell lysates and protein removal prior to HPLS Concentration of dilute or pre-purified proteins from column eluents Desalting, buffer exchange and protein dialysis