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Unbiased Selectivity Coefficients of Potentiometric Sensors Using Thin Membrane Layers

ContributorsZdrachek, Elenaorcid; Bakker, Eric
Published inElectroanalysis, vol. 33, no. 5, p. 1225-1232
Publication date2021-01-20
First online date2021-01-20
Abstract

Solid-contaction-selectiveelectrodeswiththinmembranescan moreeasilyachievecompleteion ex-changeat the sample-membraneinterface,givingun-biasedselectivitycoefficients.The calculatedrecondition-ingratecorrespondswellto experimentaldata.Alternatively,the redoxstateof the conductingpolymermaybe electrochemicallyswitchedresultingin primaryion expulsionfromthe membraneand interferingionuptakefromthe sample.Bothapproachesweretestedfortetrabutylammonium-selectiveelectrodes.The approach’slimitationsare identified,whichincludesprimaryionsimpuritiesin interferingion saltsandan interactionbetweenprimaryion and redoxpolymer.Theselimita-tionsare visualizedwithionophore-basedsodium-andsilver-selectiveelectrodes.

Keywords
  • Ion-selectiveelectrodes
  • Potentiometry
  • Thin-layermembranes
  • Selectivitycoefficient
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Citation (ISO format)
ZDRACHEK, Elena, BAKKER, Eric. Unbiased Selectivity Coefficients of Potentiometric Sensors Using Thin Membrane Layers. In: Electroanalysis, 2021, vol. 33, n° 5, p. 1225–1232. doi: 10.1002/elan.202060605
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Article (Published version)
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Additional URL for this publicationhttps://onlinelibrary.wiley.com/doi/10.1002/elan.202060605
Journal ISSN1040-0397
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Creation17/02/2022 13:09:16
First validation27/05/2025 12:58:19
Update27/05/2025 12:58:19
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