Voltammetric determination of creatinine using a gold electrode modified with Nafion mixed with graphene quantum dots-copper

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dc.contributor.authorPedrozo-Penafiel M.J.
dc.contributor.authorLopes T.
dc.contributor.authorGutierrez-Beleno L.M.
dc.contributor.authorDa Costa M.E.H.M.
dc.contributor.authorLarrude D.G.
dc.contributor.authorAucelio R.Q.
dc.date.accessioned2024-03-12T23:45:52Z
dc.date.available2024-03-12T23:45:52Z
dc.date.issued2020
dc.description.abstract© 2020 Elsevier B.V.Creatinine levels in blood and urine can be used as an important biomarker for the diagnosis of renal, thyroid, and muscle malfunctions. In this work, a square-wave voltammetric method for creatinine was developed using a gold electrode modified with a film composed by Nafion mixed with a graphene quantum dots dispersion prepared in the presence of Cu2+. Such Au/Nafion-GQDs-Cu electrode relies on the interactions of creatinine with Cu2+ released from the oxidation of Cu thus decreasing the characteristic Cu/Cu2+ anodic peak at +350 mV. A linear response was obtained for the analyte in the concentration range from 1.0 × 10−6 mol L−1 (0.11 mg L−1) to 4.5 × 10−4 mol L−1 (50.9 mg L−1). The proposed sensor was simple to prepare and the method was successfully applied for creatinine determination in urine samples.
dc.description.volume878
dc.identifier.doi10.1016/j.jelechem.2020.114561
dc.identifier.issn1572-6657
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34863
dc.relation.ispartofJournal of Electroanalytical Chemistry
dc.rightsAcesso Aberto
dc.subject.otherlanguageCopper
dc.subject.otherlanguageCreatinine
dc.subject.otherlanguageGraphene quantum dots
dc.subject.otherlanguageNafion
dc.subject.otherlanguageSquare-wave voltammetry
dc.subject.otherlanguageUrine samples
dc.titleVoltammetric determination of creatinine using a gold electrode modified with Nafion mixed with graphene quantum dots-copper
dc.typeArtigo
local.scopus.citations18
local.scopus.eid2-s2.0-85089431046
local.scopus.subjectAnodic peaks
local.scopus.subjectConcentration ranges
local.scopus.subjectGold electrodes
local.scopus.subjectLinear response
local.scopus.subjectSquare waves
local.scopus.subjectUrine sample
local.scopus.subjectVoltammetric determination
local.scopus.subjectVoltammetric methods
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85089431046&origin=inward
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