| Parameter | Conditions |
|---|---|
| Instrument | IC-CD (Professional IC Vario, Metrohm, USA) |
| Column | Analytical column: Metrosep A Supp 7-250/4.0 |
| Guard column: Metrosep RP 2 Guard | |
| Eluent | 3.6 mM sodium carbonate solution |
| Flow rate | 0.7 mL/min |
| Detector | Conductivity detector |
| Suppressor | Metrohm suppressor module (100 mM H2SO4) |
| Oven temperature | 50°C |
| Injection volume | 20 |