Please use this column with suppressor type ion chromatography system.

Chloric acid should be analyzed by ion chromatography for water quality standard in accordance to the Ministry of Health, Labor and Welfare in Japan. Oxyhalides and anion standards in river water were analyzed using IC SI-52 4E. 1 mL of Ethylendiamine (EDA) solution (50 mg/mL) is to be added into 1 L sample, to prevent generation of chloric acid through the reaction between chlorous acid and residual chlorine.



Sample : 50 μL
Std. (1 mg/L each) containing
EDA 50 mg/L

Sample : 50 μL River water containing EDA 50 mg/L

1. F^-
2. ClO₂^-
3. BrO₃^-
4. Cl^-
5. HCO₃^-
6. NO₂^-
7. Br^-
8. ClO₃^-
9. NO₃^-
10. HPO₄^2-
11. SO₄^2-

Column       : Shodex IC SI-52 4E (4.0 mm I.D. x 250 mm)
Eluent       : 3.6 mM Na2CO3 aq.
Flow rate    : 0.8 mL/min
Detector     : Suppressed conductivity
Column temp. : 45 °C