ANIONS: IC columns used with chemical suppression

Carbonate eluent
(Standard eluent: at 45°C):

Sodium hydrogen carbonate: 5.0 mmol/L ; 840 mg/2 L
Sodium carbonate: 5.0 mmol/L ; 1060 mg/2 L

Carbonate eluent, modified 1
(at 25 °C)

Sodium hydrogen carbonate: 5.0 mmol/L ; 840 mg/2 L
Sodium carbonate: 5.0 mmol/L ; 1060 mg/2 L
Sodium perchlorate: 5 µmol/L ; 1.2 mg /2 L

Carbonate eluent, modified 2
(at 25 °C)

Sodium hydrogen carbonate: 5.0 mmol/L ; 672 mg/2 L
Sodium carbonate: 5.0 mmol/L ; 1272 mg/2 L
Sodium perchlorate: 5 µmol/L ; 1.2 mg /2 L

Standard:

Rinse with

a) 50 mL of 0.05 mol/L Na₂H₂EDTA at 0.5 mL/min. 
b) 0.1 mol/L NaOH at 0.5 mL/min for 1 h.

Organic components:

Rinse with 70% methanol at 1.0 mL/min for 12 h. Depending on the contamination, the addition of 1% acetic acid might be useful.

Applications:

• Standard anions
• Separation of sulfite and sulfate
• Easy separation tasks
• Uncomplicated matrices
• Phosphate in the presence of cyclamate in cola drinks
• IC/MS coupling