APPLICATION FOR THE ELECTROCATALYTIC OXIDATION AND AMPEROMETRIC DETERMINATION OF GLUCOSE USING A COMPOSITE OF NICKEL HEXACYANOFERRATE INTEGRATED GRAPHENE AND p-PARAPHENYLENEDIAMINE

摘要

In this work, a stable electro active thin film of Nickel hexacyanoferrate (NiHCF) was placed on the surface of a Graphene and p-Peraphenylenediamine composite electrode using a humble method. Cyclic voltammetric experiments presented two pairs of well-defined peaks for this NiHCF modified electrode which displayed excellent electrocatalytic possessions for the oxidation of glucose at a reduced over potential of 50 mV and over a concentration range of 3.33x10(-6) to 1.0x10(-3)M with a slope of 0.208 micro A/micro M with respectable sensitivity. The effect of the supporting electrolyte on peak current and peak potential were also gained in addition with effects of common meddling on the response of the improved electrode. Various parameters that influence the electrochemical behavior of the improved electrode were heightened by varying scan rates and pH. In the Electrochemical impedance spectroscopy studies recommended that the electrode reaction of the NiHCF film is mainly controlled by transport of counter ion and immobilized NiHCF preserved its redox activity presenting a surface controlled electrode reaction with the electron transfer. The results of the differential pulse voltammetry (DPV) using the modified electrode was applied for the determination of glucose, in the commercially obtainable drugs. The results obtained expose that the electrode under study could be used as an effective sensor for online nursing of glucose.