Kinetics and stoichiometry of reactions between the 2,2-diphenyl-1-picrylhydrazyl (DPPH) stable radical and 25
antioxidant compounds with different structure, molecular weight, number of −OH groups, and redox potential were investigated
by recording the loss of DPPH• absorbance at 515 nm continuously for 10 min. A series of antioxidant concentrations was tested
to determine linear response ranges and reaction saturation points. The primary feature distinguishing antioxidant activityrate
of initial reaction (