Tap Water (4) (I-524A)

Based on the method described in the Japanese regulation for water supply, anions were analyzed using IC I-524A.
Please refer to 'Regulation for Water Supply'.

(Preparation of eluent)
1) Put 0.332g of reagent grade phthalic acid, 0.223g of reagent grade tris(hydroxymethyl)aminomethane and 18.5g of boric acid into a 1 liter messflask.
2) Dilute with purified water to make up a 1 liter solution.
3) Dissolve by stirring and warming.
4) Pass through a 0.2micron membrane filter before use.

This method is patented in Japan by Shimadzu Corporation.


Sample : Tap water (Water)
1. H₂PO₄^2-
2. F^-
3. Cl^-
4. NO₂^-
5. Br^-
6. NO₃^-
7. SO₄^2-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 2.5mM Phthalic acid + 1.84mM Tris(hydroxymethyl)aminomethane + 300mM Boric acid(pH4.0)
Flow rate    : 1.2mL/min
Detector     : Shodex CD
Column temp. : 40deg-C