The electrochemical results indicated that gallic acid presented typical irreversible oxidation processes,and an irreversible oxidation peak was observed with the peak potentials of 0.48V(vs.SCE) on the graphite electrode.A sensitive differential pulse voltammetry anodic peak at Epa= 0.38V(vs.SCE) was also detected with a good linear relationship between the peak current and the concentration: ipa = 2.408 c+3.028,r=0.999 6.A novel micro-electrochemical titration method for evaluating the scavenging effect o...