| Items | anion | cation |
| Column | Ion Pac AS12A (25 cm(L.), 4 mm × 250 mm | Ion Pac CS12A, 4 mm × 250 mm |
| Eluent | 3.5 mM sodium carbonate + 1.0 mM sodium-bicarbonate | Methanesulfonic acid 20 mM |
| Velocity of eluent | 1.2 mL/min. | 1.0 mL/min |
| Injection volume | 50 uL | 50 uL |
| Detector | Electric conductivity detector | Electric conductivity detector |