Four hydrophobic anions were analyzed using an anion analysis column for non-suppressor method, IC I-524A. The method optimized here is able to analyze hydrophobic anions without the interference of standard anions.


Sample : 20 μL
1. Cl^- 5 mg/L
2. NO₃^- 10 mg/L
3. SO₄^2- 10 mg/L
4. S₂O₃^2- 50 mg/L
5. I^- 50 mg/L
6. SCN^- 50 mg/L
7. ClO₄^- 50 mg/L

Column       : Shodex IC I-524A (4.6 mm I.D. x 100 mm)
Eluent       : 2.5 mM Phthalic acid + 3.3 mM Tris(hydroxymethyl)aminomethane aq.
Flow rate    : 1.2 mL/min
Detector     : Non-suppressed conductivity
Column temp. : 40 °C