For analysis of antioxidant in colored or complex samples, electrochemical methods are more advantageous than spectrometric. Cyclic voltammetry with glassy carbon (GC) electrode has been used for evaluation of antioxidant capacity of blood plasma, tissue homogenates and some plant extracts [32]. Voltammetric behavior of some antioxidants was investigated by using differential pulse voltammetry on GC electrode [33]. Amperometric analysis of antioxidant on GC electrode in flow injection (FI) format was also reported for determination of total phenolic compounds in foods [34] and of antioxidant capacity in honey, propolis and royal jelly [35]. An automated ABTS