title: Comparison of the fast gradient performance of new prototype silica monolithic columns and columns packed with fully porous and core-shell particles.
abstract: The gradient elution performance of narrow-bore 2.3 mm × 50 mm (N733) and wider bore 3.2 mm × 50 mm (N648 and N655) prototype silica monolithic columns was investigated and compared to the performance of commercially available columns packed with sub-2 μm fully porous particles (2.1 mm × 50 mm, 1.7 μm BEH-C(18), Waters) and sub-3 μm superficially porous particles (2.1 mm × 50 mm, 2.7 μm Halo-ES-Peptide-C(18) (AMT), 1.7 and 2.6 μm Kinetex-C(18), Phenomenex). Results show that the two wide monolithic columns show peak capacities similar to the one measured for the Kinetex column. In contrast, the narrow-bore monolithic column delivers a lower performance (-30%) than the BEH, the Halo and the Kinetex columns. This work stresses out the importance of reducing the extra-column band broadening contribution of HPLC instruments when short 2.1mm I.D. columns are used. The part of the instrument contribution originating downstream the column is important for all compounds; the one originating upstream the column is significant only for weakly retained compounds.
authors.affiliation: Department of Chemistry, University of Tennessee, Knoxville, TN 37996-1600, USA.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Gritti
authors.forename: Nobuo
authors.initials: N
authors.lastname: Tanaka
authors.forename: Georges
authors.initials: G
authors.lastname: Guiochon
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation* / Q000379:methods; D058086:Microalgae / Q000737:chemistry; D008956:Models, Chemical; D009930:Organic Chemicals / Q000032:analysis / Q000737:chemistry; D010316:Particle Size; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D012822:Silicon Dioxide