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Separation of seven inorganic anions using Metrosep A Supp 16 column

Separation of inorganic anion standards at eluent conditions recommended by the column manufacturer.

Background and noise was suppressed by Xenoic® XAMS membrane suppressor with the Xenoic® ASUREX automatic regenerator.

Metrosep A Supp 16 with XAMS suppressor

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.

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