Functionality Analysis of Spent Coffee Ground Extracts Obtained by the Hydrothermal Method

Table 3

IC₅₀ values of DPPH scavenging for SCG.

Extraction conditions	DPPH free-radical scavenging activity (IC50, % v/v)	References
Hydrothermal method (5 g SCG/35 mL, 150°C, 3 h)	0.31	Present study
60% ethanol (2 g SCG/100 mL, 60°C, 30 min)	1.47∼3.67	[20]
Water (2 g SCG/100 mL, 60°C, 30 min)	2.33∼6.74	[20]