Organic acids in vinegar were analyzed using RSpak KC-811.
Sample : Vinegar, 20 μL
(1) :
1. Citric acid , 2. Tartaric acid
3. Malic acid, 4. Succinic acid
5. Acetic acid
(2) :
1. Phosphoric acid, 2. Citric acid
3. Tartaric acid, 4. Gluconic acid
5. Malic acid, 6. Succinic acid
7. Lactic acid, 8. Fumaric acid
9. Acetic acid, 10. Propionic acid
Columns : Shodex RSpak KC-G 8B (8.0mmI.D. x 50mm) + KC-811 (8.0mmI.D. x 300mm) x 2 Eluent : 3mM HClO4 aq. Flow rate : (Eluent); 1.0mL/min, (Reagent) ; 0.7mL/min Detector : VIS(430nm) (Post column method) Column temp. : 50°C
