Separation of seven inorganic anions using ICSep AN1 column

Ion chromatography of anions on a ICSep AN1 column (250×4.6 mm) using an eluent containing 1.8 mM Na₂CO₃ and 1.7 mM NaHCO₃ in water pumped at 1.0 mL/min at 24 °C. Background reduced to ~13 µS/cm by XAMS suppressor with ASUREX-A200 automatic regenerator. Eluent pumping and conductivity detection by Metrohm 761 Compact IC. Injection of 20 µL of F¯(2 mg/L), Cl¯ (3 mg/L), NO₂¯ (5 mg/L), Br¯, NO₃¯ (10 mg/L), PO₄²¯ (15 mg/L), SO₄²¯ (20 mg/L) in water.