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Impedance-based sensor for potassium ions.

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cam.issuedOnline2018-06-20
dc.contributor.authorDay, C
dc.contributor.authorSøpstad, S
dc.contributor.authorMa, H
dc.contributor.authorJiang, C
dc.contributor.authorNathan, A
dc.contributor.authorElliott, SR
dc.contributor.authorKaret Frankl, FE
dc.contributor.authorHutter, T
dc.contributor.orcidMa, Hanbin [0000-0002-7629-2287]
dc.contributor.orcidJiang, Chen [0000-0002-6806-5324]
dc.contributor.orcidHutter, Tanya [0000-0001-8106-1830]
dc.date.accessioned2018-10-10T10:45:03Z
dc.date.available2018-10-10T10:45:03Z
dc.date.issued2018-11-30
dc.description.abstractA conductometric sensor for potassium ions in solution is presented. Interdigitated, planar gold electrodes were coated with a potassium-selective polymer membrane composed of a poly(vinyl chloride) matrix with about 65 wt% of plasticiser and 2-5 wt% of a potassium-selective ionophore. The impedance of the membrane was measured, using the electrodes as a transducer, and related to the concentration of potassium in a sample solution in contact with the membrane. Sensitivity was optimised by varying the sensor components, and selectivity for potassium over sodium was also shown. The resulting devices are compact, miniature, robust sensors which, by means of impedance measurements, eliminate the need for a reference electrode. The sensor was tested for potassium concentration changes of 2 mM across the clinically relevant range of 2.7-18.7 mM.
dc.description.sponsorshipHenslow Fellowship, Darwin College, Cambridge L'Oreal -UNESCO UK & Ireland Fellowship For Women In Science
dc.format.mediumPrint-Electronic
dc.identifier.doi10.17863/CAM.30895
dc.identifier.eissn1873-4324
dc.identifier.issn0003-2670
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/283532
dc.languageeng
dc.language.isoeng
dc.publisherElsevier BV
dc.publisher.urlhttp://dx.doi.org/10.1016/j.aca.2018.06.044
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectBlood analysis
dc.subjectConductometric sensor
dc.subjectImpedance spectroscopy
dc.subjectIon-selective membrane
dc.subjectPortable sensor
dc.subjectPotassium
dc.subjectElectric Impedance
dc.subjectElectrochemical Techniques
dc.subjectIons
dc.subjectPotassium
dc.titleImpedance-based sensor for potassium ions.
dc.typeArticle
dcterms.dateAccepted2018-06-15
prism.endingPage45
prism.publicationDate2018
prism.publicationNameAnal Chim Acta
prism.startingPage39
prism.volume1034
pubs.funder-project-idKidney Research UK (RP_053_20160307)
rioxxterms.licenseref.startdate2018-11
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1016/j.aca.2018.06.044

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