The total antioxidant capacity was measured by QUENCHER
method described by Serpen, G€okmen, Pellegrini, and Fogliano
(2008). Stock solution of ABTSþ was prepared by reacting a
7 mmol/L aqueous solution of ABTS with 2.45 mmol/L K2O8S2 (final
concentration). The cookie sample (10 mg) was mixed with 20 mL
of ABTSþ working solution, which was obtained by diluting the
stock solution in water/ethanol mixture (50:50, mL:mL), and the
mixture was shaken for 25 min. After centrifugation at 9200g
for 5 min at 10 C the absorbance measurement was performed
at 734 nm. The total antioxidant capacity was expressed as Trolox
equivalent antioxidant capacity (TEAC) in mmol of Trolox per kg
of d.m.