Anion Standards (7) (Anions and Organic Acids)

Anion standards were analyzed using IC I-524A. The concentration of phthalic acid is lower than that of Anion Standards (6) (I-524A). This eluent condition is suited to the separation of anions and organic acids.


Sample : 30micro-L
1. H₂PO₄^- 20mg/L
2. F^- 2.5mg/L
3. Cl^- 2.5mg/L
4. NO₂^- 5mg/L
5. Br^- 5mg/L
6. NO₃^- 5mg/L
7. SO₄^2- 5mg/L
8. Malic acid 20mg/L
9. Oxalic acid 20mg/L
10. Fumaric acid 20mg/L
11. Citric acid 20mg/L

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 1.5mM Phthalic acid + 1.38mM Tris(hydroxymethyl)aminomethane + 300mM Boric acid
Flow rate    : 1.2mL/min
Detector     : Non-suppressed coductivity
Column temp. : 40deg-C