2.7. Antioxidant activity determinations 2.7.1. ABTS assays For ABTS assay, the procedure followed the method of Arnao. Cano. and Acosta (2001) with some modifications. The stock solu- tions included 7.4 miM ABTS solution and 2.6 mM potassium per- solution was then prepared by sulfate solution. The working mixing the two stock solutions in equal quantities and allowing them to react for 12 h at room temperature in the dark. This solu- tion was then diluted by mixing 1 mL ABTS solution with 60 mL methanol to obtain an absorbance of 1.1:0.02 units at 734 nm Fresh ABTs solution was prepared using the spectrophotometer. for each assay. Fruit extracts (150 HL) were allowed to react with 2850 of the ABTS solution for 2 h in the dark. Then. the absor The stan using a spectrophotometer. bance was read at 734 dard curve was linear between 25 and 600 mM Trolox. Results are expressed in uM Trolox equivalents (TE)lg dry mass. as means of three replicates