Table of Anion retention Time under Various Eluent Conditions (SI-90 4E)

Please use this column with suppressor type ion chromatography system.

Common anions were analyzed with anion analysis column, IC SI-90 4E, under different eluent conditions. Result is summarized in the table.
(1) Optimal/recommended condition: 1.8 mM Na₂CO₃ + 1.7 mM NaHCO₃ aq.
(2) For sample containing high carbonate concentration or for high sensitivity analysis: 1.0 mM Na₂CO₃ + 4.0 mM NaHCO₃ aq.
(3) Eluent of strongest retention among 3 conditions: 12.0 mM NaHCO₃ aq.


Sample :
F^-
Acetic acid
Formic acid
Methacrylic acid
Cl^-
NO₂^-
Br^-
NO₃^-
PO₄^3-
SO₄^2-
Oxalic acid
I^-
WO₄^2-
MoO₄^2-
S₂O₃^2-
CrO₄^2-
SCN^-

Column       : Shodex IC SI-90 4E (4.0mmID*250mm)
Eluent       : (1) 1.8mM Na2CO3 + 1.7mM NaHCO3 aq.
               (2) 1.0mM Na2CO3 + 4.0mM NaHCO3 aq.
               (3) 12mM NaHCO3 aq.
Flow rate    : 1.0mL/min
Detector     : Suppressed conductivity
Column temp. : 25deg-C