Polythionic Acids

Polythionate(SO₄^2-, SO₃^2-, etc.) can be analyzed using IC I-524A. What 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 0.345g of reagent grade p-hydroxybenzoic acid and 100mL of methanol into a 1 liter messflask and dissolve; adjusted with 0.2M reagent grade diethylethanolamine and add pure water to make up a 1 liter solution.


Sample :
1. SO₄^2-
2. S₂O₃^2-
3. S₃O₆^2-
4. S₄O₆^2-

Column       : Shodex IC I-524A (4.6mmID*100mm)
Eluent       : 2.5mM p-Hydroxybenzoic acid(pH9.7 adjusted with N,N-Diethylethanolamine) + 10% CH3OH
Flow rate    : 1.2mL/min
Detector     : Non-suppressed coductivity
Column temp. : 40deg-C