Organic Acids in Soybean Paste

Soybean paste was analyzed using RSpak KC-811.


Sample : Soybean paste extract, 100micro-L
1. Citric acid
2. Malic acid
3. Lactic acid
4. Formic acid
5. Acetic acid
6. Pyroglutamic acid

Columns      : Shodex RSpak KC-LG (8.0mmID*50mm) + KC-811 (8.0mmID*300mm) x 2
Eluent       : 3mM HClO4 aq.
Reagent      : 10-fold diluted ST3-R (for post-column method)
Flow rate    : 1.0mL/min
Detector     : VIS(430nm)
Column temp. : 40deg-C