Anion Standards (1) (I-524A)

Anion standards were analyzed using IC I-524A. A phthalic acid eluent of pH4.0 is recommended for the general analysis. Most of the important anions such as F^-, H₂PO₄^-, Cl^-, NO₂^-, Br^-, NO₃^- and SO₄^2- can be analyzed with this eluent. Therefore, it is suitable for the routine analysis of anions.

(Preparation of eluent(pH4.0))
(1) Put 0.415g of reagent grade phthalic acid and 0.278g 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. H₂PO₄^-
2. Cl^-
3. NO₂^-
4. Br^-
5. NO₃^-
6. SO₄^2-

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