Achieve both high sample recovery and fast sample processing. EMD Amicon Ultra Centrifugal Filter Units feature regenerated cellulose membranes that are ideal for protein & nucleic acid purification, concentration and desalting. High-recovery Ultracel-PL regenerated cellulose membranes with MWCOs of 3, 10, 30, 50 or 100kDa Vertical membrane reduces polarization for ultrafast spin times (as little as 10 to 15 min.) Heat-sealed membrane eliminates possibility of downstream extractables Universal rotor compatibility High retentate recovery of >90% High concentration factors of 80- to 100-fold (minimum final concentrate volume: 200μL) Easy sample monitoring due to translucent housing and volume gradations Direct pipetter sample access eliminates processing step to recover concentrate Centrifugal filter enables Concentration of biological samples containing antigens, antibodies, enzymes, nucleic acids, or microorganisms Purification of macromolecular components found in tissue culture extracts or cell lysates Concentration of dilute or prepurified proteins from column eluents Desalting and buffer exchange