期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 218, 期 -, 页码 25-30出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.04.089
关键词
Solid-contact ion-selective electrodes; Zn-Pb mine; Determination of lead(II); Lead(II) ionophore; Influence of interfering ions
资金
- Gdansk University of Technology [DS 030893]
- Abo Akademi University Process Chemistry Centre
Lead and its compounds are a serious threat to the environment. Monitoring of this toxic heavy metal is a driving force for the continuous development of novel lead(II) ionophores to be applied in ion-selective electrodes. In this work a highly selective lead(II) ionophore, namely 25,26,27,28-tetrakis(piperidinylthiocarbonylmethylene)-p-tert-butylcalix[4]arene, was used in solid-contact ion-selective electrodes for determination of Pb(II) at high concentrations of interfering ions, such as Na(I), Cu(II), Cd(II), Zn(II), Mg(II) and Ca(II). The potentiometric response of ionophore-based Pb(II)-ISEs was compared to that of a solid-state crystalline Pb(II)-ISE for Na+, Cu2+, Cd2+ and Zn2+. Determination of lead(II) by ion-selective electrodes was compared to measurements done by atomic absorption spectroscopy. Comparable concentrations of lead were obtained by both techniques, which indicate the possibility to apply such ion-selective electrodes for monitoring of lead in e.g. Zn-Pb mines where the concentration of zinc may be high compared to lead. (C) 2015 Published by Elsevier B.V.
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