Anion Standards (2) (I-524A)

Anion standards were analyzed using IC I-524A. Different from the case of a phtalic acid eluent of pH 4.0, with the eluent of pH4.2, anions elute in rather a short time and making it suitable for rapid analysis of anions though phosphoric ion has almost no response with this eluent.

(Preparation of eluent(pH4.2))
(1) Put 0.415g of reagent grade phthalic acid and 0.291g of reagent grade tris(hydroxymethyl)aminomethane into a 1 liter messflask.
(2) Dilute with purified water to make up a 1 liter solution.
(3) Dissolve using an ultrasonic vibrator.
(4) Pass through a 0.2microm membrane filter before use.


Sample :
1. F^-
2. Cl^-
3. NO₂^-
4. Br^-
5. NO₃^-
6. SO₄^2-
7. S₂O₃^2-
8. I^-
9. SCN^-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 2.5mM Phthalic acid(pH4.2 adjusted by Tris(hydroxymethyl)aminomethane)
Flow rate    : 1.2mL/min
Detector     : Shodex CD
Column temp. : 40°C