, produced
from the reaction of ABTS 7 mM and 2.45 mM potassium persulphate,
was stored in the dark at room temperature for 12 h before
use and diluted with ethanol to reach an absorbance of 0.70 ± 0.05
at 734 nm. 25 mL of different (5, 10, 20, 40, and 80 mg/mL) of pepper
extracts were added to 2 mL of diluted ABTS solution and the
absorbance was measured at 6 min at 734 nm.