Separation of seven inorganic anions using Metrosep A Supp 16 column

Ion chromatography of anions on a Metrosep A Supp 16 column (250×4 mm) using an eluent containing 7.5 mM Na₂CO₃ and 0.75 mM NaOH in water pumped at 0.7 mL/min at 24 °C. Background reduced to ~21 µS/cm by XAMS suppressor with ASUREX-A100 automatic regenerator. Eluent pumping and conductivity detection by Metrohm 761 Compact IC. Injection of 20 µL of F¯, Cl¯ (2 mg/L), NO₂¯ (5 mg/L), Br¯, NO₃¯, SO₄²¯, HPO₄²¯ (10 mg/L) in water.