Tap Water (3) (I-524A)

Anions in tap water were analyzed using IC I-524A. Since
phosphoric ion is not present in this sample, F^–, Cl^–,
NO₃^– and SO₄^2- can be separated in a short time without t he interference of phosphoric ion peak using this eluent. When both F^– and H₂PO₄^– are present, they cannot be separated each othe with this analysis conditionr.

Sample : Tap water (Water), 100micro-L

1. F^–

2. Cl^–

3. NO₃^–

4. SO₄^2-

 Column : Shodex IC I-524A (4.6mmID*100mm)
 Eluent : 2.5mM Phthalic acid + 2.3mM Tris(hydroxymethyl)aminomethane aq.
 Flow rate : 1.2mL/min
 Detector : Shodex CD
 Column temp. : 40°C