The citric acid in phosphoric acid was analyzed using RSpak DE-613 and KC-811.
Sample :
1. Phosphoric acid
2. Citric acid
3. Malic acid
.
Columns : Shodex RSpak KC-G 8B (8.0mmI.D. x 50mm)
+ DE-613 (6.0mmI.D. x 150mm) x 2 + KC-811 (8.0mmI.D. x 300mm) x 3
Eluent : 2mM HClO4 aq.
Flow rate : (Eluent); 1.0mL/min, (Reagent); 0.5mL/min
Detector : VIS(430nm) (post column method)
Column temp. : 50°C
