Synthesis and Characterization of a Silica/Tungsten(VI) Oxide and Its Performance for the On-Line Solid-Phase Extraction (SPE) of Nickel Ions from Aqueous Media with Determination by Flame Atomic Absorption Spectrometry (FAAS)

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Autor(es): dc.contributorUniversidade Estadual de Londrina (UEL)-
Autor(es): dc.contributorFederal Institute of Parana (IFPR)-
Autor(es): dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.creatorBarreto, Túlio Rolim-
Autor(es): dc.creatorGorla, Felipe Augusto-
Autor(es): dc.creatorFerreira, Milena do Prado-
Autor(es): dc.creatorDuarte, Pedro Henrique Araújo-
Autor(es): dc.creatorRibeiro, Emerson Schwingel [UNESP]-
Autor(es): dc.creatorAfonso, Júlio Carlos-
Autor(es): dc.creatorTarley, César Ricardo Teixeira-
Data de aceite: dc.date.accessioned2022-02-22T00:26:36Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:36Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1080/00032719.2020.1793997-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199151-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199151-
Descrição: dc.descriptionThe present paper describes a new analytical method exploiting a SiO2/WO3 mixed oxide as an adsorbent synthesized via sol-gel process for the preconcentration of Ni2+. This material was characterized by energy dispersive X-ray fluorescence spectroscopy, powder X-ray diffraction, Fourier transform infrared spectroscopy, analysis of the specific surface area by Brauner, Emmett and Telle multipoint method, the average pore size and pore volume by Barrett-Joyner-Halenda method, scanning electron microscopy, and electron dispersive spectroscopy. The mixed oxide presented high surface area (710.9 m2 g−1), average pore size of 35.1 Å, and average pore volume of 0.128 cm−3 g−1. This material was used as the an adsorbent in an on-line procedure for pre-concentration of solid phase extraction, based on the adsorption of Ni2+ ions at pH 10.5 followed by elution with 1.0 mol L−1 HNO3 and determination by flame atomic absorption spectrometry. Under optimized conditions, a linear range from 10.0 to 170.0 µg L−1, an enrichment factor of 38.8-fold, and limits of detection and quantification of 4.23 µg L−1 and 14.11 µg L−1 were obtained. The precision of method, estimated as percentage of relative standard deviation of ten replicates of 30.0, 90.0 and 150.0 µg L−1 Ni2+ solutions, was lower than 4.10%. The method was employed for analysis of water samples and the accuracy was attested by addiction and recovery tests, with satisfactory recoveries (98.4–109.2%). Thus, the developed material can be successfully applied to water samples for monitoring of Ni2+ at very low levels without matrix influence.-
Descrição: dc.descriptionDepartment of Chemistry State University of Londrina (UEL)-
Descrição: dc.descriptionCampus Assis Chateaubriand Federal Institute of Parana (IFPR)-
Descrição: dc.descriptionInstitute of Chemistry Federal University of Rio de Janeiro (UFRJ)-
Descrição: dc.descriptionNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Paulista State University–Júlio de Mesquita Filho (UNESP)-
Descrição: dc.descriptionNational Institute of Science and Technology in Bioanalysis (INCTBio) Department of Chemistry Institute of Chemistry State University of Campinas (UNICAMP)-
Descrição: dc.descriptionNational Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Paulista State University–Júlio de Mesquita Filho (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationAnalytical Letters-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectFlame atomic absorption spectrometry (FAAS)-
Palavras-chave: dc.subjectsilica/tungsten(VI) oxide-
Palavras-chave: dc.subjectSiO2/WO3 mixed oxide-
Palavras-chave: dc.subjectsolid-phase extraction (SPE)-
Palavras-chave: dc.subjectwater samples-
Título: dc.titleSynthesis and Characterization of a Silica/Tungsten(VI) Oxide and Its Performance for the On-Line Solid-Phase Extraction (SPE) of Nickel Ions from Aqueous Media with Determination by Flame Atomic Absorption Spectrometry (FAAS)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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