Table 1. Condition of HPLC for analyzing free sugar and organic acid contents

Parameters	Condition
	Free sugar	Organic acid
Instrument	HPLC (HPLC 600E, Waters Co., Milford, MA, USA)	HPLC (HPLC 600E, Waters Co., Milford, MA, USA)
Column	Sugar-Pak I column (6.5×300 mm, Waters, Milford, MA, USA)	PL Hi-Plex H column (7.7×300 mm, Agilent Technologies, Santa Clara, CA, USA)
Flow rates	0.5 mL/min	0.6 mL/min
Column oven	90°C	65°C
Mobile phase	0.001 M Ca-ethylenediaminetetraacetic acid (Ca-EDTA, Sigma Chemical Co., St. Louis, MO, USA) buffer	0.005 M sulfuric acid (Duksan, Ansan, Korea)