en
Scientific article
English

Voltammetric thin-layer ionophore-based films : Part 2. Semi-empirical treatment

Published inAnalytical chemistry, vol. 89, no. 1, p. 595-602
Publication date2017
Abstract

This work reports on a semiempirical treatment that allows one to rationalize and predict experimental conditions for thin-layer ionophore-based films with cationexchange capacity read out with cyclic voltammetry. The transition between diffusional mass transport and thin-layer regime is described with a parameter (α), which depends on membrane composition, diffusion coefficient, scan rate, and electrode rotating speed. Once the thin-layer regime is fulfilled (α = 1), the membrane behaves in some analogy to a potentiometric sensor with a second discrimination variable (the applied potential) that allows one to operate such electrodes in a multianalyte detection mode owing to the variable applied ion-transfer potentials. The limit of detection of this regime is defined with a second parameter (β = 2) and is chosen in analogy to the definition of the detection limit for potentiometric sensors provided by the IUPAC. The analytical equations were validated through the simulation of the respective cyclic voltammograms under the same experimental conditions. While simulations of high complexity and better accuracy satisfactorily reproduced the experimental voltammograms during the forward and backward potential sweeps (companion paper 1), the semiempirical treatment here, while less accurate, is of low complexity and allows one to quite easily predict relevant experimental conditions for this emergent methodology.

Research group
Citation (ISO format)
YUAN, Dajing et al. Voltammetric thin-layer ionophore-based films : Part 2. Semi-empirical treatment. In: Analytical chemistry, 2017, vol. 89, n° 1, p. 595–602. doi: 10.1021/acs.analchem.6b03355
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
ISSN of the journal0003-2700
469views
0downloads

Technical informations

Creation2017/07/11 16:19:00
First validation2017/07/11 16:19:00
Update time2023/03/15 01:49:39
Status update2023/03/15 01:49:38
Last indexation2024/01/17 00:16:28
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack