Analysis of Organic Acids and Oxyhalides (SI-35 4D)

Shodex IC SI-35 4D (a column for rapid oxyhalides analysis) was used for the analysis of seven common anions and some organic acids. The long elution time (i.e., more than 30 minutes for succinic acid and malonic acid) required by IC SI-52 4E was shorten to 15 minutes using IC SI-35 4D. Therefore, IC SI-35 4D is also suitable for the rapid analysis of organic acids.

Sample : 20micro-L

1. F^– 1mg/L

2. Lactic acid 10mg/L

3. Formic acid 5mg/L

4. Cl^– 2mg/L

5. NO₂^– 6mg/L

6. Br^– 4mg/L

7. NO₃^– 4mg/L

8. PO₄^3- 10mg/L

9. SO₄^2- 8mg/L

10. Malonic acid 10mg/L

11. Succinic acid 20mg/L

12. Adipic acid 20mg/L

 Column : Shodex IC SI-35 4D (4.0mmID*150mm)
 Eluent : 3.6mM Na2CO3 aq.
 Flow rate : 0.6mL/min
 Detector : Suppressed conductivity
 Column temp. : 45deg-C