TY - JOUR

T1 - Thick-film voltammetric pH-sensors with internal indicator and reference species

A1 - Musa,Arnaud Emmanuel

A1 - Alonso-Lomillo,María Asunción

A1 - del Campo,Francisco Javier

A1 - Abramova,Natalia

A1 - Domínguez-Renedo,Olga

A1 - Arcos-Martínez,María Julia

A1 - Kutter,Jörg Peter

AU - Musa,Arnaud Emmanuel

AU - Alonso-Lomillo,María Asunción

AU - del Campo,Francisco Javier

AU - Abramova,Natalia

AU - Domínguez-Renedo,Olga

AU - Arcos-Martínez,María Julia

AU - Kutter,Jörg Peter

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - The following paper describes the development of a screen-printed voltammetric pH-sensor based on graphite electrodes incorporating both internal indicator (i.e., phenanthraquinone) and reference species (i.e., dimethylferrocene). The key advantages of this type of system stem from its simplicity, low cost and ease of fabrication. More importantly, as opposed to conventional voltammetric systems where the height of the voltammetric peaks is taken into account to quantify the amount of a species of interest, here, the difference between the peak potential of the indicator species and the peak potential of the reference species is used. Thus, this measurement principle makes the electrochemical system presented here less dependent on the potential of the reference electrode (RE), as is often the case in other electrochemical systems. The developed system displays very promising performances, with a reproducible Super Nernstian response to pH changes and a lifetime of at least nine days.

AB - The following paper describes the development of a screen-printed voltammetric pH-sensor based on graphite electrodes incorporating both internal indicator (i.e., phenanthraquinone) and reference species (i.e., dimethylferrocene). The key advantages of this type of system stem from its simplicity, low cost and ease of fabrication. More importantly, as opposed to conventional voltammetric systems where the height of the voltammetric peaks is taken into account to quantify the amount of a species of interest, here, the difference between the peak potential of the indicator species and the peak potential of the reference species is used. Thus, this measurement principle makes the electrochemical system presented here less dependent on the potential of the reference electrode (RE), as is often the case in other electrochemical systems. The developed system displays very promising performances, with a reproducible Super Nernstian response to pH changes and a lifetime of at least nine days.

KW - Voltammetric sensors

KW - Internal reference species

KW - Derivative voltammetry

KW - Disposable sensors

KW - Screen-printing

U2 - 10.1016/j.talanta.2012.07.014

DO - 10.1016/j.talanta.2012.07.014

JO - Talanta

JF - Talanta

SN - 0039-9140

VL - 99

SP - 737

EP - 743

ER -