Table 3
Caffeine contents in coffee extract (CE), coffee ground liqueur (CGL), and coffee liqueur (CL) (unit: μg/mg of dried extract)

standards	samples1)
	CE	25% CGL(1 month)	25% CGL(2 month)	35% CGL(1 month)	35% CL(1 month)	35% CL(2 month)
Caffeine	35.6±3.5c2)	39.3±1.1ab	39.2±0.7ab	42.1±0.2a	38.9±0.3b	37.2±1.5bc

25%, 35%, Concentration of alcohol; Month, soaking period.
Results are shown as mean±SD (n=3). Data were statistically considered at p<0.05, and different letters ^(a~c)in table represent statistical difference.