Table 3. Comparison of ABTS+ radical scavenging activities of fingerroot

Samples Scavenging activity (%)1) IC50(μg/mL)
200 μg/mL 100 μg/mL 50 μg/mL 25 μg/mL 12.5 μg/mL
80% MeOH ext. 76.5±1.8b 57.1±2.1c 39.5±1.1d 24.6±2.3e 10.5±0.8f 75.0±2.4b
80% EtOH ext. 73.6±2.1b 51.9±1.2c 34.2±0.8d 21.2±2.4e 10.7±1.1f 88.9±3.3b
80% Acetone ext. 74.9±0.9b 53.6±0.7c 34.9±1.3d 19.5±1.3e 12.3±1.9e 85.5±3.2b
Hot water ext. 43.3±1.4c 28.9±1.7e 12.3±1.1e 4.8±3.1f 2.7±2.5f >200a
(+)-Catechin2) 99.9±0.7a 98.7±0.2a 93.2±1.7a 84.2±1.3a 77.8±1.6b 6.4±1.8f
Scavenging activities are expressed as the means±SD of triplicate experiments. Different letters (a-f) within the same column indicate significant differences (p<0.05).
(+)-Catechin was used as a positive control.