Multicalibrational procedure for more reliable analyses of ions at low analyte concentrations

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Grzegorz Lisak, Ari Ivaska, Andrzej Lewenstam, Johan Bobacka
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2014
Journal: Electrochimica Acta
Journal acronym: ELECTROCHIM ACTA
Volume number: 140
Issue number: Special issue
Start page: 27
End page: 32
Number of pages: 6
ISSN: 0013-4686
eISSN: 1873-3859


Abstract

Pb2+-ISEs were used to demonstrate a new multicalibrational approach which gives comprehensive information about the response of a potentiomeric sensor. The method was used to study and optimize the non-equilibrium response of sensors, such as obtained with solid-contact ISEs used in time dependent conditioning procedure with recovery of the low detection limit at lowest analyte concentrations. The developed method allows better handling of non-equilibrium conditions in quantitative determinations of analytes. The multicalibrational approach with time optimization showed to be superior when compared to fixed measurement time approach using Pb2+-ISEs at non-equilibrium in the determination of lead(II) in environmental sample.


Keywords

ion-selective electrodes, non-equilibrium sensors, potentiometry

Last updated on 2019-17-11 at 03:02