Scavenging activity of SCC on hydroxyl radical was calculated according to the following formula:
[(AS-AO)/( A-AO)] × 100.
comparing ∆A1/min (without SCC) and ∆A2/min (with SCC) of the pyrogallol system; 100 µL of 3 mM pyrogallol and 3 mL of Tris buffer (pH 8.2) were mixed with 0.5 mL of SCC at different concentrations.