The glucose, arabinose, xylose, and galactose concentrations in the hydrolysate were
analyzed by a Dionex ICS-3000 ion chromatography system (Dionex Corporation)
equipped with a CarboPac TM PA 20 (4×50 mm) analytical column and a CarboPac TM
PA 20 (3×30 mm) guard column. Samples were filtered through a 0.2-μm-pore-size filter
before injection and eluted with 0.01 M NaOH at a flow rate of 0.5 mL/min. The analytes
were detected and quantified against standard carbohydrates by electrochemical detection in
a pulsed amperometric detector