Anion Standards (16) (NI-424: Phthalic Acid aq. Eluent)

Seven kinds of anions can be separated using IC NI-424 even with eluent containing phthalic acid. The peak for phosphoric acid ion is sharper than with eluent containing 4-hydroxybenzoic acid. (Injection of the same amount of the sample as that in Anion Standards (15) gives peak hights twice as high as those in Anion Standards (15).)


Sample :
1. H₂PO₄^-
2. F^-
3. Cl^-
4. NO₂^-
5. Br^-
6. NO₃^-
7. SO₄^2-

Column       : Shodex IC NI-424 (4.6mmID*100mm)
Eluent       : *2.1mM Phthalic acid + 2.9mM Amino-n-capronic acid + 6mM Phenylboronic acid(pH3.9)
Flow rate    : 1.0mL/min
Detector     : Shodex CD
Column temp. : 40deg-C

^* The prescribed pH can be obtained by mixing the reagents in the composition described here.