prikaz prve stranice dokumenta Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode
  Download
PDF 1.14 MB
master's thesis
Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. urn:nbn:hr:149:519567
Boček, Željka
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Boček, Ž. (2023). Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:519567

Boček, Željka. "Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:519567

Boček, Željka. "Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2023. https://urn.nsk.hr/urn:nbn:hr:149:519567

Boček, Ž. (2023). 'Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 22 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:519567

Boček Ž. Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2023 [cited 2024 November 22] Available at: https://urn.nsk.hr/urn:nbn:hr:149:519567

Ž. Boček, "Određivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:149:519567

Metadata
TitleOdređivanje analitičkih značajki čvrstofazne amonij-selektivne elektrode
Title (english)Determination of analytical parameters of a solid state ammonium-selective electrode
AuthorŽeljka Boček
MentorPetar Kassal (mentor)
Committee memberPetar Kassal (predsjednik povjerenstva)
Committee memberMatija Cvetnić (član povjerenstva)
Committee memberZoran Mandić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2023-07-12, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovom radu primjenom elektroanalitičkih tehnika određene su analitičke značajne čvrstofazne amonij-selektivne elektrode – osjetljivost, granica detekcije, linearno područje, vrijeme odziva, stabilnost i selektivnost. Uz navedene analitičke značajke ispitana je i reverzibilnost u linearnom području. Na poliimidnu podlogu inkjet ispisom naneseni su srebrni elektrodni supstrat i grafenski čvrsti kontakt. Nakon termičkog i fotonskog sinteriranja na pripremljenu elektrodu nakapana je polimerna amonij-selektivna membrana s nonaktinom kao ionoforom. Potenciometrijskim mjerenjima dobivene su baždarne i dinamičke krivulje u standardnim otopinama kloridnih soli primarnog iona (NH4+), iona interferenata (K+, Na+, Ca2+, Mg2+) i primarnog iona s konstantnom koncentracijom interferentnog iona. Osjetljivost, granica detekcije i linearno područje određeni su iz ovisnosti izmjerene elektromotorne sile o logaritmu aktiviteta NH4+ iona, dok je vrijeme odziva izračunato iz istovremeno određene dinamičke krivulje. Stabilnost naponskog odziva elektrode ispitana je testom na vodeni sloj. Potenciometrijski koeficijenti selektivnosti određeni su metodom odvojenih otopina i metodom miješanih otopina.
Abstract (english)
Analytical parameters of an all-solid-state ammonium selective electrode – sensitivity, limit of detection, linear range, response time, stability and selectivity were determined by using electroanalytical methods. Reversibility in the linear range was also tested. Silver electrode substrate and graphene solid contact were inkjet printed on polyimide substrates. After thermal and photonic sintering, polymeric ammonium-selective membrane with nonactin as the ionophore was drop-cast on top of the prepared electrode. Calibration and dynamic potential curves were obtained via potentiometric measurements in the chloride solutions of the primary ion (NH4+), interferent ions (K+, Na+, Ca2+, Mg2+) and the primary ion with a constant background of interferent ion. Sensitivity, limit of detection and linear range were determined from the calibration curve recorded in primary ion solutions of varying activities, while the response time was determined from the dynamic potential response curve obtained simultaneously. Potential stability of the ammonium-selective electrode was explored through water layer test. Potentiometric selectivity coefficients were determined via separate solution method and fixed interference method.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:519567
ProjectNumber: UIP-2020-02-9139
Title: Fotonsko sinteriranje inkjet ispisanih elektrokemijskih senzora i biosenzora na plastičnim podlogama
Title: Photonic sintering for inkjet printed electrochemical sensors and biosensors on plastic substrates
Acronym: PrintEChemSens
Leader: Petar Kassal
Jurisdiction: Croatia
Funder: HRZZ
Funding stream: UIP
Study programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Advanced materials and technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2023-07-27 09:45:25