The
Ferric-reducing/antioxidant
power reagent included 0.01 mol/l TPTZ (2, 4, 6-tripyridyl-s-triazine)
solution in 0.04 mol/l HCl, 0.02 mol/l FeCl3 solution and 0.3 mol/l
acetate buffer (pH3.6) in proportions of 1:1:10(v/v). Aqueous
solutions of ferrous sulfate (0e1000 mmol/l) were used for calibration