Investigating a new approach for magnetic ionic liquids: Dispersive liquid-liquid microextraction coupled to pyrolysis gas-chromatography-mass spectrometry to determine flame retardants in sewage sludge samples

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorIowa State University-
Autor(es): dc.contributorUniversidade Federal de Ciências da Saúde de Porto Alegre-
Autor(es): dc.creatorRodrigues, Thais-
Autor(es): dc.creatorFerreira, Karen Chibana-
Autor(es): dc.creatorIsquibola, Guilherme-
Autor(es): dc.creatorFranco, Douglas Faza-
Autor(es): dc.creatorAnderson, Jared L.-
Autor(es): dc.creatorMerib, Josias de Oliveira-
Autor(es): dc.creatorLima Gomes, Paulo Clairmont Feitosa de-
Data de aceite: dc.date.accessioned2025-08-21T18:37:12Z-
Data de disponibilização: dc.date.available2025-08-21T18:37:12Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-08-16-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.chroma.2024.465038-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/301821-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/301821-
Descrição: dc.descriptionThis study addresses the analysis of emerging contaminants, often using chromatographic techniques coupled to mass spectrometry. However, sample preparation is often required prior to instrumental analysis, and dispersive liquid-liquid microextraction (DLLME) is a viable strategy in this context. DLLME stands out for its ability to reduce sample and solvent volumes. Notably, dispersive liquid-liquid microextraction using magnetic ionic liquids (MILs) has gained relevance due to the incorporation of paramagnetic components in the chemical structure, thereby eliminating the centrifugation step. A pyrolizer was selected in this work to introduce sample onto the GC column, since the MIL is extremely viscous and incompatible with direct introduction through an autosampler. This study is the first to report the use of a DLLME/MIL technique for sample introduction through a pyrolizer in gas chromatography coupled to mass spectrometry (GC–MS). This approach enables the MIL to be compatible with gas chromatography systems, resulting in optimized analytical and instrument performance. The analysis of polybrominated diphenyl ether flame retardants (PBDEs) was focused on the PBDE congeners 28, 47, 99, 100, and 153 in sewage sludge samples. The [P6,6,6,14+]2[MnCl42−] MIL was thoroughly characterized using UV–Vis, Fourier transform infrared spectroscopy (FTIR), and Raman spectroscopy, as well as thermal analysis. In the chromatographic method, a pyrolyzer was used in the sample introduction step (Py-GC–MS), and critical injection settings were optimized using multivariate approaches. Optimized conditions were achieved with a temperature of 220 °C, a pyrolysis time of 0.60 min, and an injection volume of 9.00 μL. DLLME optimization was performed through central compound planning (CCD), and optimized training conditions were achieved with 10.0 mg of MIL, 3.00 μL of acetonitrile (ACN) as dispersive solvent, extraction time of 60 s, and volume of a sample of 8.50 mL. Precision was observed to range from 0.11 % to 12.5 %, with limits of detection (LOD) of 44.4 μg L−1 for PBDE 28, 16.9 μg L−1 for PBDE 47 and PBDE 99, 33.0 μg L−1 for PBDE 100 and 375 μg L−1 for PBDE 153. PBDE 28 was identified and analyzed in the sludge sample at a concentration of 800 μg L−1. The use of MIL in dispersive liquid-liquid microextraction combined with pyrolysis gas chromatography-mass spectrometry enables identification and quantification of PBDEs in sewage sludge samples at concentrations down to the µg L−1 level.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionNational Science Foundation-
Descrição: dc.descriptionDepartment of Analytical Chemistry Physical Chemistry and Inorganic Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionDepartment of Analytical Chemistry Physical Chemistry and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), SP-
Descrição: dc.descriptionDepartment of Chemistry Iowa State University-
Descrição: dc.descriptionDepartamento de Farmacociências Universidade Federal de Ciências da Saúde de Porto Alegre, RS-
Descrição: dc.descriptionDepartment of Analytical Chemistry Physical Chemistry and Inorganic Chemistry National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionDepartment of Analytical Chemistry Physical Chemistry and Inorganic Chemistry Institute of Chemistry São Paulo State University (UNESP), SP-
Descrição: dc.descriptionFAPESP: #2022/02991-3-
Descrição: dc.descriptionFAPESP: #2023/04832-2-
Descrição: dc.descriptionCNPq: #465571/2014-0-
Descrição: dc.descriptionCAPES: #88887136426/2017/00-
Descrição: dc.descriptionNational Science Foundation: CHE-2203891-
Descrição: dc.descriptionFAPESP: INCT-DATREM #2014/50945-4-
Idioma: dc.languageen-
Relação: dc.relationJournal of Chromatography A-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDispersive liquid-liquid microextraction-
Palavras-chave: dc.subjectGas chromatography coupled to mass spectrometry-
Palavras-chave: dc.subjectMagnetic ionic liquids-
Palavras-chave: dc.subjectPyrolyzer-
Título: dc.titleInvestigating a new approach for magnetic ionic liquids: Dispersive liquid-liquid microextraction coupled to pyrolysis gas-chromatography-mass spectrometry to determine flame retardants in sewage sludge samples-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.