On-line micro-solid phase preconcentration of Cd2 + coupled to TS-FF-AAS using a novel ion-selective bifunctional hybrid imprinted adsorbent

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dc.creatorCésar Ricardo Teixeira Tarley
dc.creatorMarcela Zanetti Corazza
dc.creatorFernanda Midori de Oliveira
dc.creatorBruna Fabrin Somera
dc.creatorClésia Cristina Nascentes
dc.creatorMariana Gava Segatelli
dc.date.accessioned2025-03-13T22:21:08Z
dc.date.accessioned2025-09-09T00:51:26Z
dc.date.available2025-03-13T22:21:08Z
dc.date.issued2017
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.microc.2016.11.013
dc.identifier.issn0026-265X
dc.identifier.urihttps://hdl.handle.net/1843/80644
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofMicrochemical Journal
dc.rightsAcesso Aberto
dc.subjectAdsorção
dc.subjectEspectroscopia de absorção atomica
dc.subjectRaios X - Difração
dc.subjectPolímeros
dc.subjectEspectroscopia de infravermelho
dc.subjectPolímeros inorgânicos
dc.subject.otherAdsorption
dc.subject.otherIsotherm
dc.subject.otherFIA-TS-FF-AAS
dc.subject.otherPoly(vinylpyridine-TRIM)-SiO2/mercaptopropyltrimet
dc.subject.otherPreconcentration
dc.titleOn-line micro-solid phase preconcentration of Cd2 + coupled to TS-FF-AAS using a novel ion-selective bifunctional hybrid imprinted adsorbent
dc.typeArtigo de periódico
local.citation.epage69
local.citation.spage57
local.citation.volume131
local.description.resumoA novel hybrid ion imprinted polymer (HIIP) is proposed aiming at the development of an online micro-solid phase preconcentration system of Cd2 + coupled to TS-FF-AAS. To evaluate the selective and adsorptive performance of HIIP towards Cd2 +, hybrid non-imprinted polymer (HNIP), organic ion imprinted polymer (OIIP), and the inorganic ion imprinted polymer (IIIP) were synthesized and compared with each other. Adsorption capacity of HIIP was 53% higher than HNIP, and dual-site Langmuir–Freundlich isotherm model showed the best fit for data of both polymers. The preconcentration system coupled to TS-FF-AAS was performed by loading 10.0 mL of Cd2 + solution at pH 7.5 through 80.0 mg of HIIP packed into a micro-column with posterior online elution using 1.0 mol L− 1 HCl/ethanol 1:1 (v/v) mixture. The developed method was highly tolerant for other metal ions Zn2 +, Pb2 +, Cu2 +, Co2 +, Fe2 +, and Hg2 + at analyte:interferent (1:50, m/m) ratio and Ca2 + and Mg2 + at 1:500 (m/m) ratio. Analytical curve ranging from 0.5 to 7.0 μg L− 1, limit of detection of 30 ng L− 1 and preconcentration factor of 14-fold were obtained. Intra-day and inter-day (3 days) experiment precision (n = 10) was, respectively, 3.9 and 0.6% (relative standard deviation, RSD), and 4.4 and 2.4% for concentrations of 0.7 and 6.5 μg L− 1. Sensitivity of method (Abs L μg− 1) was about 3.3, 2.2 and 1.9-fold higher when compared to preconcentration method using HNIP, OIIP and IIIP, respectively, thus clearly showing that hybrid polymer and imprinting process enhance Cd2 + adsorption. Addition and recovery experiments ranging from 94 to 106% in mineral, lake water and tap water, urine and cigarette samples attested the feasibility of method for analysis of matrices containing different components. Moreover, the accuracy of method was checked from analysis of certified reference material (DOLT-4, fish liver), being the obtained value of 23.9 ± 0.6 mg kg− 1 (n = 3) statistically equal to the certified value of 24.3 ± 0.8 mg kg− 1, by applying Student t-test at 95% confidence level.
local.identifier.orcidhttps://orcid.org/0000-0002-8514-442X
local.identifier.orcidhttps://orcid.org/0000-0002-7930-1265
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0026265X16303393?via%3Dihub

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