Comparison of different approaches to the description of the detection limit of ion-selective electrodes

The Nernst–Planck–Poisson (NPP) model is a general approach to the description of the electro-diffusion processes which lead to the formation of the membrane potential. It takes into consideration several parameters of ion-selective electrodes (ISEs) which are ignored in simpler models. This paper p...

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Bibliographic Details
Published in:Electrochimica acta 2010-09, Vol.55 (22), p.6836-6848
Main Authors: Jasielec, Jerzy J., Sokalski, Tomasz, Filipek, Robert, Lewenstam, Andrzej
Format: Article
Language:English
Subjects:
Chemistry
Electro-diffusion
Electrochemistry
Electrodes
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Inverse
Ion selective electrodes
Mathematical models
Membrane potential
Membranes
Modelling
Nernst–Planck–Poisson
Potentiometry
Subnanomolar detection limit
Time-dependency
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Summary:The Nernst–Planck–Poisson (NPP) model is a general approach to the description of the electro-diffusion processes which lead to the formation of the membrane potential. It takes into consideration several parameters of ion-selective electrodes (ISEs) which are ignored in simpler models. This paper presents a critical comparison between the NPP model and simpler models. The influence of different parameters on the detection limit of ISEs is discussed. This is achieved by comparing direct predictions of the models and, in contrast to any earlier treatment, by inverse modelling. This makes it possible to simultaneously find out which set of physical parameters of the system will produce the desired detection limit.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2010.05.083