Further Studies on Application of Al(III)-tetraazaporphine in Membrane-Based Electrochemical Sensors for Determination of Fluoride

Agnieszka Bala , Mariusz Pietrzak , Joanna Zajda , Elżbieta Malinowska

Abstract

Herein, fluoride-selective electrodes with polymer membranes doped with Al(III)-complex of tetraazaporphine (AlTAP) were thoroughly tested for possibility of use for determination of fluoride in samples of relatively low F− level, such as municipal water. For this aim electrodes with plasticized membranes containing AlTAP and both: unmodified poly(vinyl chloride) and borate additives or carboxylated PVC of various levels of functional groups were prepared and examined. For better characterization of tested ionophore prepared membranes were plasticized with bis(2-ethylhexyl) sebacate (DOS), o-nitrophenyl octyl ether (o-NPOE), 2-fluorophenyl 2-nitrophenyl ether (2-FPNPE) and chloroparaffin (CP). It was found that the reduction of examined sample pH from 3.0 to 2.2 allows for lowering of detection limit to levels, which are typically achieved when using LaF3-based electrode. Among tested, electrodes with membranes containing borate sites characterized themselves with slightly better detection limits and shorter response time. Optimization of measuring conditions allowed the determination of fluoride with good accuracy in municipal and mineral water samples. Moreover, in the framework of presented work, pulsed chronopotentiometry was tested in terms of elimination or limitation of OH− influence on detection limits of AlTAP-based sensors. It turned out, that chemical nature of hydroxide does not enable elimination of its influence on AlTAP-based sensors operation. Therefore, the lower detection limits obtained for sensors when using this technique were highly dependent on pH.
Author Agnieszka Bala (FC / IBC / DM)
Agnieszka Bala,,
- Department Of Microbioanalytics
, Mariusz Pietrzak (FC / IBC / DM)
Mariusz Pietrzak,,
- Department Of Microbioanalytics
, Joanna Zajda (FC / IBC / DM)
Joanna Zajda,,
- Department Of Microbioanalytics
, Elżbieta Malinowska (FC / IBC / DM)
Elżbieta Malinowska,,
- Department Of Microbioanalytics
Journal seriesSensors and Actuators B - Chemical, ISSN 0925-4005, (A 40 pkt)
Issue year2015
Vol207
Pages1004-1009
Publication size in sheets0.5
Keywords in EnglishIon-selective electrode; Fluoride; Tetraazaporphine; Potentiometry; Pulsed chronopotentiometry
DOIDOI:10.1016/j.snb.2014.10.024
URL http://www.sciencedirect.com.scopeesprx.elsevier.com/science/article/pii/S0925400514012349
Languageen angielski
File
1-s2.0-S0925400514012349-main.pdf 381.29 KB
Score (nominal)40
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2015 = 4.758 (2) - 2015=4.582 (5)
Citation count*3 (2016-09-14)
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back