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Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/8932
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dc.contributor.authorVeltsistas, P. G.en
dc.contributor.authorProdromidis, M. I.en
dc.contributor.authorEfstathiou, C. E.en
dc.date.accessioned2015-11-24T16:45:26Z-
dc.date.available2015-11-24T16:45:26Z-
dc.identifier.issn0003-2670-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/8932-
dc.rightsDefault Licence-
dc.subjectscreen-printed compatible solid contacten
dc.subjectall-solid-state iseen
dc.subjectascorbic aciden
dc.subjectpotentiometryen
dc.subjectpoly(vinyl chloride) membraneen
dc.subjectmodified platinum-electrodeen
dc.subjection-selective electrodesen
dc.subjectelectrocatalytic oxidationen
dc.subjectvitamin-cen
dc.subjectspectrophotometric methoden
dc.subjectphthalocyanineen
dc.subjectconstructionen
dc.subject2,6-dichlorophenolindophenolen
dc.subjectcopper(ii)en
dc.titleAll-solid-state potentiometric sensors for ascorbic acid by using a screen-printed compatible solid contacten
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.primaryDOI 10.1016/j.aca.2003.09.060-
heal.identifier.secondary<Go to ISI>://000187731200003-
heal.identifier.secondaryhttp://ac.els-cdn.com/S0003267003013047/1-s2.0-S0003267003013047-main.pdf?_tid=5c11eed6a956a9ddc6b31e8c3cab2f1e&acdnat=1333037449_25dda46eb4ff9248440a8c12f88c284c-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείαςel
heal.publicationDate2004-
heal.abstractThe development of all-solid-state potentiometric ion selective electrodes for monitoring of ascorbic acid, by using a screen-printed compatible solid contact is described. The applied methodology is based on the use of PVC membrane modified with some firstly-tested ionophores (triphenyltin(IV)chloride, triphenyltin(IV)hydroxide and palmitoyl-L-ascorbic acid) and a novel one synthesized in our laboratory (dibutyltin(IV) diascorbate). Synthesis protocol and some preliminary identification studies are given. A conductive graphite-based polymer thick film ink was used as an internal solid contact between the graphite electrode and the PVC membrane. The presence and the nature of the solid contact (plain or doped with lanthanum 2,6-dichlorophenolindophenol (DCPI)) seem to enhance the analytical performance of the electrodes in terms of sensitivity, dynamic range, and response time. The analytical performance of the constructed electrodes was evaluated with potentiometry, constant-current chronopotentiometry and electrochemical impedance spectroscopy (EIS). The interference effect of various compounds was also tested. The potential response of the optimized Ph3SnCl-based electrode was linear against ascorbic acid concentration range 0.005-5.0 mM. The applicability of the proposed sensors in real samples was also tested. The detection limit was 0.002mM ascorbic acid (50mM phosphate, pH 5 in 50mM KCl). The slope of the electrodes was super-Nernstian and pH dependent, indicating a mechanism involving a combination of charge transfer and ion exchange processes. Fabrication of screen-printed ascorbate ISEs has also been demonstrated. (C) 2003 Elsevier B.V. All rights reserved.en
heal.publisherElsevieren
heal.journalNameAnalytica Chimica Actaen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
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