Based on the method described in the Japanese regulation for water supply, anions were analyzed using IC I-524A.
Sample : 100micro-L each Anion standards
1. H2PO42- 10mg/L
2. F– 1mg/L
3. Cl– 1mg/L
4. NO2– 5mg/L
5. Br– 5mg/L
6. NO3– 5mg/L
7. SO42- 5mg/L
Tap water (Water)
2. F–
3. Cl–
6. NO3–
7. SO42-
Column : Shodex IC I-524A (4.6mmID*100mm) Eluent : 2.0mM Phthalic acid + 1.84mM Tris(hydroxymethyl)aminomethane + 300mM Boric acid aq. Flow rate : 1.2mL/min Detector : Shodex CD Column temp. : 40°C