Table 1
Operating conditions of HPLC in analysis of 6-gingerol and 6-shogaol

Items	Condition
Instrument	Agilent UV 1200 system
Column	RP18
Column oven	25°C
Detector	UV detector
Absorbance	282 nm
Flow rate	1.0 mL/min
Mobile phase	Isocratic(MeOH:D.W=80:20)
Injection volumn	10 μL