LC Chromatography Columns

Brownlee SPP 2.7 µm Peptide ES-C18 3.0 X 75 mm

Sterically protected ligand (isobutyl - side chains), results in an Extra Stable bonded phase at low pH where most peptide separations are performed. The 160 Angstrom pore size was specially chosen for the molecular weight range of peptides.

Features and Benefits Solid inner core, porous silica outer shell, shorter diffusion path Very high efficiencies at moderate back pressures   Nearly twice the efficiency of 3-µm particle columns As robust as columns packed with 5-µm particles because

Sterically protected ligand (isobutyl - side chains), results in an Extra Stable bonded phase at low pH where most peptide separations are performed. The 160 Angstrom pore size was specially chosen for the molecular weight range of peptides.

Brownlee SPP 2.7 µm Peptide ES-C18 4.6 X 75 mm

Features and Benefits Solid inner core, porous silica outer shell, shorter diffusion path Very high efficiencies at moderate back pressures   Nearly twice the efficiency of 3-µm particle columns As robust as columns packed with 5-µm particles because

Highly retentive and selective for protonated basic analytes and molecules containing aromatic moities. End-capped pentafluorophenyl with a propyl spacer.

Brownlee SPP 2.7 µm PFP 3.0 X 100 mm

Highly retentive and selective for protonated basic analytes and molecules containing aromatic moities. End-capped pentafluorophenyl with a propyl spacer.

Solid inner core, porous silica outer shell, shorter diffusion path Very high efficiencies at moderate back pressures   Nearly twice the efficiency of 3-µm particle columns As robust as columns packed with 5-µm particles because columns use 2-µm frit

Alternative selectivity to alkyl bonded phases, recommended for aromatic groups. Compatible with highly aqueous mobile phases to facilitate the retention and separation of polar compounds.

Brownlee SPP 2.7 µm Phenyl-Hexyl 2.1 X 150 mm