Within a Carbon Paste Electrode

An early attempt to explain, on a theoretical basis, the stripping voltammetric 

the metal microparticles (powder) are considered to be uniformly distributed within the carbon paste, which is assumed as a continuous, conducting medium. 

For both reversible and irreversible conditions, Butler-Volmer kinetics and uniform planar diffusion over the whole electrode were assumed. The peak potential of the stripping process under electrochemically reversible conditions is given as 

The case of electrochemically irreversible stripping using the planar diffusion model is consistent with the results of a recent study [40] (see also Section 6.3.3.2). 

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