Cyclic Voltammetric Determination of Coenzyme (Qo) Using Graphite Electrode

The anodic oxidation and cathodic reduction of coenzyme Qo (CoQ0) were studied using cyclic voltammetry (CV) at graphite electrode (C) in Britton -Robinson buffer (B.R.B) of pH ( 2-9). The result shows that the charge transfer processes were reversible over all pH range. The method is used to determine CoQ0 in concentration range ( 8.7 10-5 1.9 10-6 ) M at pH = 2 with a reduction potential of 0.325 V and 0.235 V for reduction and oxidation processes versus Ag / AgCl sat. KCl reference electrode