Voltammetric study of vitamin K-3 at interdigitated array microelectrodes

Cyclic voltammetry of Vitamin K-3 (V-K3) was measured with Pt disk electrod e, platinum interdigitated array (Pt-IDA) and Au-IDA microelectrodes in sin gle and dual modes. The effects of pH, scan rate and collector potential on the current of generator and collector were studied. The collection effici ency of V-K3 at IDA electrodes was measured. The linear ranges for current response as a function of V-K3 concentration were found to he 10 mu M-1 mM (i(g)) and 1 mu M - 1 mM (i(c)) for the generator and collector of the Pt-I DA electrode, respectively. The effects of waiting time, potential differen ce and pulse electrolysis time in differential pulse voltammetry (DPV) on t he peak current of V-K3 were studied to get the optimal condition at 0.1 M Na2HPO4, pH 11.50 and 11.0 for Au-IDA and Pt-IDA, respectively.