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dc.contributor.author
de S Dias, Fabio  
dc.contributor.author
Guarino, Maria Elisabeth P.A.  
dc.contributor.author
Costa Pereira, Amalia L.  
dc.contributor.author
Pedra, Pablo P.  
dc.contributor.author
de A. Bezerra, Marcos  
dc.contributor.author
Marchetti, Sergio Gustavo  
dc.date.available
2020-12-01T16:49:59Z  
dc.date.issued
2019-05  
dc.identifier.citation
de S Dias, Fabio; Guarino, Maria Elisabeth P.A.; Costa Pereira, Amalia L.; Pedra, Pablo P.; de A. Bezerra, Marcos; et al.; Optimization of magnetic solid phase microextraction with CoFe2O4 nanoparticles unmodified for preconcentration of cadmium in environmental samples by flame atomic absorption spectrometry; Elsevier Science; Microchemical Journal; 146; 5-2019; 1095-1101  
dc.identifier.issn
0026-265X  
dc.identifier.uri
http://hdl.handle.net/11336/119477  
dc.description.abstract
A method of preconcentration based in the magnetic solid phase microextraction with CoFe 2 O 4 nanoparticles for the determination of cadmium in oyster and water samples using flame atomic absorption spectrometry (FAAS). Magnetic nanomaterials ones have aroused a greater interest in the area of analytical chemistry because of the high area of material and separation facility of the adsorbent. The statistical significance variables, extraction time, nanoparticles mass, pH, eluent concentration and desorption time were evaluated using a fractional factorial design of two levels (2 5–1 ). Afterward, a design Doehlert was used to optimize the pre-concentration process. The best experimental conditions were: nanoparticles mass (25 mg), pH (10.0) and eluent concentration of 1.20 mol L −1 . The method allowed the determination of cadmium with a LOD of 0.24 μg L −1 and LOQ of 0.80 μg L −1 . The precision expressed as relative standard deviation (RSD) of 3.33% for cadmium concentration with 20 μg L −1 , the accuracy of the method was confirmed by the analysis of materials certified reference NIST 1566b Oyster tissue, pre-concentration factor 31. The method was applied to the analysis of the oyster and water samples has determined the concentration of cadmium from 4.6 to 7.8 mg kg −1 for oyster and 2.75 to 4.8 μg L −1 for water.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
CADMIUM  
dc.subject
MAGNETIC NANOPARTICLE  
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PRE-CONCENTRATION  
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SOLID-PHASE MICROEXTRACTION  
dc.subject.classification
Química Analítica  
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Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Optimization of magnetic solid phase microextraction with CoFe2O4 nanoparticles unmodified for preconcentration of cadmium in environmental samples by flame atomic absorption spectrometry  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-11-18T16:16:12Z  
dc.journal.volume
146  
dc.journal.pagination
1095-1101  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: de S Dias, Fabio. Universidade Federal Do Recôncavo Da Bahia; Brasil  
dc.description.fil
Fil: Guarino, Maria Elisabeth P.A.. Universidade Estadual Do Sudoeste Da Bahia; Brasil  
dc.description.fil
Fil: Costa Pereira, Amalia L.. No especifíca;  
dc.description.fil
Fil: Pedra, Pablo P.. Universidade Federal Do Recôncavo Da Bahia; Brasil  
dc.description.fil
Fil: de A. Bezerra, Marcos. Universidade Estadual Do Sudoeste Da Bahia; Brasil  
dc.description.fil
Fil: Marchetti, Sergio Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge J. Ronco". Universidad Nacional de la Plata. Facultad de Ciencias Exactas. Centro de Investigación y Desarrollo en Ciencias Aplicadas; Argentina  
dc.journal.title
Microchemical Journal  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0026265X18315704  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.microc.2019.02.005