Separation of phenolics with Fused-Core and totally porous particles. Columns: 4.6 mm × 50 mm; mobile phase gradient: 3–70% acetonitrile/water with 0.1% formic acid in 2.7 min; instrument: Agilent 1100; injection delay: 0.41 min; temperature: 45 °C; peak identities (in elution order): hydroquinone, resorcinol, catechol, phenol, 4-nitrophenol, 4,4′-biphenol, 2-chlorophenol, 4-chlorophenol, 2,2′-biphenol, 2,6-dichlorophenol, 2,4-dichlorophenol. Peak widths in minutes for selected analytes.