Monovalent and divalent cation standards were analyzed using IC YK-421.


Sample : 10 μL
1. Li⁺ 1 mg/L
2. Na⁺ 5 mg/L
3. NH₄⁺ 5 mg/L
4. K⁺ 10 mg/L
5. Rb⁺ 30 mg/L
6. Cs⁺ 30 mg/L
7. Ca²⁺ 10 mg/L
8. Mg²⁺ 5 mg/L
9. Sr²⁺ 10 mg/L
10. Ba²⁺ 10 mg/L

Column       : Shodex IC YK-421 (4.6 mm I.D. x 125 mm)
Eluent       : 5 mM Tartaric acid + 1 mM Dipicolinic acid + 1.5 g/L Boric acid aq.
Flow rate    : 1.0 mL/min
Detector     : Non-suppressed coductivity
Column temp. : 50 °C