Potentiometric Response Characteristics of Membrane-Based Cs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres
Joint Authors
Source
International Journal of Electrochemistry
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-02-22
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Cs+-selective solvent polymeric membrane-based ion-selective electrodes (ISEs) were developed by doping ethylene glycol-functionalized cross-linked polystyrene microspheres (P-EG) into a plasticized poly(vinyl chloride) (PVC) matrix containing sodium tetrakis-(3,5-bis(trifluoromethyl)phenyl) borate (TFPB) as the ion exchanger.
A systematic study examining the effects of the membrane plasticizers bis(2-ethylhexyl) sebacate (DOS), 2-nitrophenyl octyl ether (NPOE), and 2-fluorophenyl nitrophenyl ether (FPNPE) on the potentiometric response and selectivity of the corresponding electrodes was performed.
Under certain conditions, P-EG-based ion-selective electrodes (ISEs) containing TFPB and plasticized with NPOE exhibited a super-Nernstian response between 1×10−3 and 1×10−4 M Cs+, a response characteristic not observed in analogous membranes plasticized with either DOS or FPNPE.
Additionally, the performance of P-EG-based ISEs was compared to electrodes based on two mobile ionophores, a neutral lipophilic ethylene glycol derivative (ethylene glycol monooctadecyl ether (U-EG)) and a charged metallacarborane ionophore, sodium bis(dicarbollyl)cobaltate(III) (CC).
In general, P-EG-based electrodes plasticized with FPNPE yielded the best performance, with a linear range from 10-1–10-5 M Cs+, a conventional lower detection limit of 8.1×10−6 M Cs+, and a response slope of 57.7 mV/decade.
The pH response of P-EG ISEs containing TFPB was evaluated for membranes plasticized with either NPOE or FPNPE.
In both cases, the electrodes remained stable throughout the pH range 3–12, with only slight proton interference observed below pH 3.
American Psychological Association (APA)
Peper, Shane& Gonczy, Chad. 2011. Potentiometric Response Characteristics of Membrane-Based Cs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres. International Journal of Electrochemistry،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-459676
Modern Language Association (MLA)
Peper, Shane& Gonczy, Chad. Potentiometric Response Characteristics of Membrane-Based Cs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres. International Journal of Electrochemistry No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-459676
American Medical Association (AMA)
Peper, Shane& Gonczy, Chad. Potentiometric Response Characteristics of Membrane-Based Cs+-Selective Electrodes Containing Ionophore-Functionalized Polymeric Microspheres. International Journal of Electrochemistry. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-459676
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-459676