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. 2015 Mar 10;4(1):170–184. doi: 10.3390/antiox4010170

Figure 1.

Figure 1

Antioxidant activity determined by the Electron paramagnetic resonance (EPR) spectrum of the radical adduct DMPO-OCH3 generated from a solution of H2O2 (2 mM) and FeSO4 (0.04 mM) with DMPO (14 mM) as spin trap in MeOH as solvent. The EPR signal decreases with the higher antioxidant activity.