Tuned galvanostatic polarization of solid-state lead-selective electrodes for lowering of the detection limit

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Lisak G, Sokalski T, Bobacka J, Harju L, Mikhelson K, Lewenstam A
Publisher: ELSEVIER SCIENCE BV
Publication year: 2011
Journal: Analytica Chimica Acta
Journal acronym: ANAL CHIM ACTA
Volume number: 707
Start page: 1
End page: 6
Number of pages: 6
ISSN: 0003-2670


Abstract

Lowering of the detection limit of solid-state lead-selective electrodes was achieved by using the tuned galvanostatic polarization method. A Nernstian response was obtained down to nanomolar concentrations (low detection limit 10(-9) mol dm(-3) Pb2+). Good repeatability of the calibration curves was achieved by using a well established measuring procedure. Relatively high cathodic current densities were applied to the solid-state membrane in order to shorten the measurement time. Successful determination of lead in a synthetic sample (pPb(2+) = 7.97 +/- 0.08) was achieved by introducing an analytical protocol and favourably compared to inductively coupled plasma mass spectrometry (pPb = 7.93). By applying this method, a significant improvement in the detection limit of solid-state lead-selective electrodes was attained. (C) 2011 Elsevier BM. All rights reserved.


Keywords

Direct measurement of lead (II), Low detection limit, Solid-state membrane

Last updated on 2020-26-02 at 06:53