Sulfate and Sulfite

This chromatogram shows a data of analysis of standard anions using IC I-524A with an alkaline eluent. When the pH of the eluent is higher than 7.0, 10% methanol should be added to maintain the durability of the packing material.

(Preparation of eluent)
Put 0.0345g of reagent grade p-hydroxybenzoic acid and 100mL of methanol into a 1 liter messflask and dissolve; add 6mL of 0.2M reagent grade diethylethanolamine and add pure water to make up a 1 liter solution.


Sample :
1. SO₄^2-
2. SO₃^2-
3. S₂O₃^2-
4. SCN^-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 0.25mM p-Hydroxybenzoic acid(pH9.7 adjusted with Diethylethanolamine) + 10% CH3OH
Flow rate    : 1.2mL/min
Detector     : Shodex CD
Column temp. : 50deg-C