Analysis of Amperometric Enzyme Electrodes in the Homogeneous Mediated Mechanism using Variational iteration Method

摘要

A Mathematical model of amperometric enzyme electrodes is re-studied using variational iterationmethod. In this paper, He variational iteration method is implemented to give an approximate and ananalytical solution of nonlinear differential equations describing the transport and kinetics of theenzyme and of the mediator in the diffusion layer of the electrode. The variational iteration methodproduces a simple analytical solution for an enzyme electrode where electron transfer is accomplishedby a mediator reacting in a homogeneous solution. These analytical results are compared withavailable limiting case results and are found to be in good agreement.