Peak 1: Aeris Peptide C18, 3.6 μm 2.1×50 mm (fused-core); Peak 2: XBridge C18, 3.5 μm 2.1×30 mm; Peak 3: Ascentis Express Peptide C18, 2.7 μm 2.1×30 mm (fused-core).
Figure 2: Column comparison in the second dimension under the same conditions.