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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual de Londrina (UEL) | - |
Autor(es): dc.contributor | Federal Institute of Parana (IFPR) | - |
Autor(es): dc.contributor | Universidade Federal do Rio de Janeiro (UFRJ) | - |
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Universidade Estadual de Campinas (UNICAMP) | - |
Autor(es): dc.creator | Barreto, Túlio Rolim | - |
Autor(es): dc.creator | Gorla, Felipe Augusto | - |
Autor(es): dc.creator | Ferreira, Milena do Prado | - |
Autor(es): dc.creator | Duarte, Pedro Henrique Araújo | - |
Autor(es): dc.creator | Ribeiro, Emerson Schwingel [UNESP] | - |
Autor(es): dc.creator | Afonso, Júlio Carlos | - |
Autor(es): dc.creator | Tarley, César Ricardo Teixeira | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:26:36Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:26:36Z | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2019-12-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1080/00032719.2020.1793997 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/199151 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/199151 | - |
Descrição: dc.description | The 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.description | Department of Chemistry State University of Londrina (UEL) | - |
Descrição: dc.description | Campus Assis Chateaubriand Federal Institute of Parana (IFPR) | - |
Descrição: dc.description | Institute of Chemistry Federal University of Rio de Janeiro (UFRJ) | - |
Descrição: dc.description | National 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.description | National Institute of Science and Technology in Bioanalysis (INCTBio) Department of Chemistry Institute of Chemistry State University of Campinas (UNICAMP) | - |
Descrição: dc.description | National 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.language | en | - |
Relação: dc.relation | Analytical Letters | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Flame atomic absorption spectrometry (FAAS) | - |
Palavras-chave: dc.subject | silica/tungsten(VI) oxide | - |
Palavras-chave: dc.subject | SiO2/WO3 mixed oxide | - |
Palavras-chave: dc.subject | solid-phase extraction (SPE) | - |
Palavras-chave: dc.subject | water samples | - |
Título: dc.title | 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) | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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