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Citric Acid in Phosphoric Acid

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-LG (8.0mmID*50mm) + DE-613 (6.0mmID*150mm) x 2 + KC-811 (8.0mmID*300mm) x 3
Eluent       : 2mM HClO4 aq.
Reagent      : 10-fold diluted ST3-R (for post-column method)
Flow rate    : (Eluent); 1.0mL/min, (Reagent); 0.5mL/min
Detector     : VIS(430nm)
Column temp. : 50deg-C