Multivariate optimization applied to chromium determination in milk and similar baby food samples by graphite furnace atomic absorption spectrometry

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dc.creatorFlávia Regina de Amorim
dc.creatorEliana Aparecida Nonato Knupp
dc.creatorJose Bento Borba da Silva
dc.creatorClésia Cristina Nascentes
dc.date.accessioned2025-01-31T22:15:26Z
dc.date.accessioned2025-09-08T23:49:43Z
dc.date.available2025-01-31T22:15:26Z
dc.date.issued2016
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.46770/AS.2016.06.006
dc.identifier.issn0195-5373
dc.identifier.urihttps://hdl.handle.net/1843/79587
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofAtomic Spectroscopy
dc.rightsAcesso Aberto
dc.subjectCromo
dc.subjectLeite
dc.subjectEspectroscopia de absorção atômica
dc.subjectLeite - Contaminação
dc.subject.otherChromium
dc.subject.otherMilk
dc.subject.otherMultivariate optimization
dc.subject.otherGraphite furnace atomic absorption spectrometry GFAAS
dc.titleMultivariate optimization applied to chromium determination in milk and similar baby food samples by graphite furnace atomic absorption spectrometry
dc.typeArtigo de periódico
local.citation.epage259
local.citation.issue6
local.citation.spage252
local.citation.volume37
local.description.resumoChromium (Cr) is an essential element, but high levels in foods can be toxic particularly for children. A fast and efficient method to determine Cr in milk and other infant foods using slurries and liquid samples is presented. Slurries were prepared in ultrapure water with 10 minutes of sonica- tion. The liquid samples were diluted in ultrapure water when necessary. Multivariate optimization was used to establish some optimal analytical parameters through a fractional factorial design and a central composite design. Slurried and diluted samples were analyzed directly by GFAAS. The method presented a limit of detection of 1.43 μg L-1, characteristic mass of 4.5 pg (recommended value of 3.0 pg), RSD from 1.5 to 11.8% (n=8), and a linear range from 4.78 to 50.0 μg L-1 using rhodium (500 μg) as the permanent modifier. The accuracy was evaluated by analyzing standard reference material SRM 8435 Whole Milk Powder. Good agreement was found with the obtained and certified values. The Cr concentrations of the powdered samples were between 0.042 and 1.900 μg g-1.
local.identifier.orcidhttps://orcid.org/0000-0001-6819-2326
local.identifier.orcidhttps://orcid.org/0000-0001-8262-1027
local.identifier.orcidhttps://orcid.org/0000-0002-8514-442X
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.at-spectrosc.com/as/article/abstract/201606006

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