General kinetic model for amperometric sensors based on Prussian blue mediator and its analogs: Application to cysteine detection
Journal
Electroanalysis
Journal Volume
18
Journal Issue
13-14
Pages
1313-1321
Date Issued
2006
Author(s)
Abstract
Abstract Prussian blue (PB) and its analogs, such as indium hexacyanoferrate (InHCF), can serve as artificial oxidases and mediate electron transfer from electrodes to analytes rapidly. Hence they are playing a growing role in the biosensor field. To gain further insight into the PB‐based amperometric sensors, a general kinetic model for the prediction of sensing current has been developed in this work. The model takes both effects of analyte diffusion and electrocatalytic reaction into consideration and defines a dimensionless system constant, θ °, in order to compare the surface catalytic rate with the analyte diffusion rate. Consequently, the mathematical expression of sensing current, I , is derived as follows:
SDGs
Type
conference paper