Silver-modified nitrogen-doped graphene quantum dots as a sensor for formaldehyde in milk using headspace micro-extraction on a single-drop of aqueous nanoparticles dispersion

Página do item simplificado
dc.contributor.authorPadilha J.D.S.
dc.contributor.authorPedrozo-Penafiel M.J.
dc.contributor.authorAzevedo M.F.M.F.
dc.contributor.authorDe Falco A.
dc.contributor.authorLarrude D.R.G.
dc.contributor.authorMaia da Costa M.E.H.
dc.contributor.authorAucelio R.Q.
dc.date.accessioned2024-03-12T19:13:32Z
dc.date.available2024-03-12T19:13:32Z
dc.date.issued2022
dc.description.abstract© 2022 Elsevier B.V.Background: Fraudulent practices used to distort the quality of milk and derivatives include the addition of formaldehyde. Results: A formaldehyde sensor was developed based on the luminescence of newly proposed N-doped graphene quantum dots modified with silver (N-GQDs-Ag) that were prepared using a simple method. A microdroplet of the nanoparticle dispersion was used to collect formaldehyde vapor by headspace single-drop micro-extraction (HS-SDME). After, the microdroplet was diluted in water, the nanoparticle photoluminescence quenching, caused by the analyte, was measured. The strong luminescent quenching allowed a detection limit at 1.7 × 10−4% w/v. Response was selective towards formaldehyde. Significance: The method was effective and a cost-effective method for screening analysis of milk samples with matrix interferences minimized due to the nature of nanoparticle (prepared using Tollen's reagent) and due to the probing at the headspace of the sample cell. Results were statistically similar to those obtained using liquid chromatography.
dc.description.volume1232
dc.identifier.doi10.1016/j.aca.2022.340479
dc.identifier.issn1873-4324
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34287
dc.relation.ispartofAnalytica Chimica Acta
dc.rightsAcesso Restrito
dc.subject.otherlanguageFormaldehyde
dc.subject.otherlanguageHeadspace single-drop micro-extraction
dc.subject.otherlanguageMilk
dc.subject.otherlanguageModified graphene quantum dots
dc.subject.otherlanguagePhotoluminescence
dc.titleSilver-modified nitrogen-doped graphene quantum dots as a sensor for formaldehyde in milk using headspace micro-extraction on a single-drop of aqueous nanoparticles dispersion
dc.typeArtigo
local.scopus.citations3
local.scopus.eid2-s2.0-85140151349
local.scopus.subjectHeadspace single-drop micro-extraction
local.scopus.subjectHeadspaces
local.scopus.subjectMicro droplets
local.scopus.subjectMicroextraction
local.scopus.subjectMilk
local.scopus.subjectModified graphene quantum dot
local.scopus.subjectNano-particle dispersions
local.scopus.subjectNitrogen doped graphene
local.scopus.subjectSingle drop micro extractions
local.scopus.subjectSingle drops
local.scopus.subjectAnimals
local.scopus.subjectFormaldehyde
local.scopus.subjectGraphite
local.scopus.subjectMilk
local.scopus.subjectNitrogen
local.scopus.subjectQuantum Dots
local.scopus.subjectSilver
local.scopus.subjectWater
local.scopus.updated2024-12-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85140151349&origin=inward
Arquivos
Coleções
Artigos de periódico