title: Relation of structure to performance characteristics of monolithic and perfusive stationary phases.
abstract: Commercially available polymer-based monolithic and perfusive stationary phases were evaluated for their applicability in chromatography of biologics. Information on bed geometry, including that from electron microscopy (EM), was used to interpret and predict accessible volumes, binding capacities, and pressure drops. For preparative purification of biologics up to at least 7 nm in diameter, monoliths and perfusive resins are inferior to conventional stationary phases due to their low binding capacities (20-30 g/L for BSA). For larger biologics, up to several hundred nanometers in diameter, calculations from EM images predict a potential increase in binding capacity to nearly 100 g/L. The accessible volume for adenovirus calculated from the EM images matched the experimental value. While the pores of perfusive resins are essentially inaccessible to adenovirus under binding conditions, under non-adsorbing conditions the accessible intrabead porosity is almost as large as the interbead porosity. Modeling of breakthrough curves showed that the experimentally observed slow approach to full saturation can be explained by the distribution of pore sizes.
authors: Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA.
authors: Egor I
authors: EI
authors: Trilisky
authors: Harun
authors: H
authors: Koku
authors: Kirk J
authors: KJ
authors: Czymmek
authors: Abraham M
authors: AM
authors: Lenhoff
mesh_terms: D000260:Adenoviruses, Human / Q000302:isolation & purification; D000465:Algorithms; D000837:Anion Exchange Resins / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation*; D007091:Image Processing, Computer-Assisted; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010047:Ovalbumin / Q000032:analysis; D010316:Particle Size; D016062:Porosity; D011506:Proteins / Q000302:isolation & purification*; D012710:Serum Albumin, Bovine / Q000032:analysis; D012965:Sodium Chloride / Q000032:analysis; D014542:Uridine Monophosphate / Q000032:analysis; D014780:Viruses / Q000302:isolation & purification*
chemical_list: D000837:Anion Exchange Resins; D011506:Proteins; D012710:Serum Albumin, Bovine; D012965:Sodium Chloride; D010047:Ovalbumin; D014542:Uridine Monophosphate