Extração por fluido supercrítico de alguns inseticidas carbamatos em amostras de batata, com determinação por HPLC/fluorescência e confirmação por HPLC/espectrometria de massas

Página do item simplificado
dc.contributor.authorNunes, Gilvanda Silva
dc.contributor.authorSantos, Teresa Cristina R.
dc.contributor.authorBarceló, Damiá
dc.contributor.authorPimenta, Alexandre Santos
dc.contributor.authorRibeiro, Maria Lúcia [UNESP]
dc.contributor.institutionUniversidade Federal do Maranhão (UFMA)
dc.contributor.institutionCSIC Centro de Investigación y Desarrollo Departamento Química Ambiental
dc.contributor.institutionUniversidade Federal de Viçosa (UFV)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:10:18Z
dc.date.available2014-05-20T15:10:18Z
dc.date.issued2002-05-01
dc.description.abstractSix supercritical fluid extraction (SFE) methods were tested, by varying the following operational parameters: CO2 pressure, time and temperature of extraction, type and proportion of static modifier, and Hydromatrix®/sample rate into cell. Firstly, insecticide carbamates were extracted from spiked potatoes samples (fortification level of 0,5 mg.Kg-1) by using SPE procedures, and then final extracts were analyzed HPLC/fluorescence. Good performance was observed with SFE methods that operated with values of temperature and CO2 pressure of 50 ºC and 350 bar, respectively. Best efficiency was obtained when it was used acetonitrile as a modifier (3% on the cell volume), and Hydromatrix®/sample rate of 2:1. Static time was of 1 min; total extraction time was of 35 min; dynamic extraction was performed with 15 mL of CO2, and it was used methanol (2 mL) for the dissolution of the final residue. In such conditions, pesticide recoveries varied from 72 to 94%, depending on the analyzed compound. In higher extraction temperatures, a rapid degradation was observed for some compounds, such as aldicarb and carbaryl; presence of their metabolites was further confirmed by HPLC-APCI/MS in positive mode. Detection limits for chromatographic analysis varied from 0,2 to 1,3 ng.en
dc.description.affiliationUniversidade Federal do Maranhão CCET Departamento de Tecnologia Química
dc.description.affiliationCSIC Centro de Investigación y Desarrollo Departamento Química Ambiental
dc.description.affiliationUniversidade Federal de Viçosa (UFV) Departamento de Engenharia Florestal
dc.description.affiliationUniversidade Estadual Paulista Instituto de Química
dc.description.affiliationUnespUniversidade Estadual Paulista Instituto de Química
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent214-220
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422002000200008
dc.identifier.citationQuímica Nova. Sociedade Brasileira de Química, v. 25, n. 2, p. 214-220, 2002.
dc.identifier.doi10.1590/S0100-40422002000200008
dc.identifier.fileS0100-40422002000200008.pdf
dc.identifier.issn0100-4042
dc.identifier.scieloS0100-40422002000200008
dc.identifier.urihttp://hdl.handle.net/11449/27577
dc.language.isopor
dc.publisherSociedade Brasileira de Química
dc.relation.ispartofQuímica Nova
dc.relation.ispartofjcr0.646
dc.relation.ispartofsjr0,255
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectSFE methoden
dc.subjectHPLC/FSen
dc.subjectHPLC-APCI/MSen
dc.subjectpotatoesen
dc.subjectpesticidesen
dc.subjectcarbamate insecticidesen
dc.titleExtração por fluido supercrítico de alguns inseticidas carbamatos em amostras de batata, com determinação por HPLC/fluorescência e confirmação por HPLC/espectrometria de massaspt
dc.title.alternativeSupercritical fluid extraction for some carbamate insecticides in potatoes samples, with HPLC/fluorescence determination and HPLC/mass spectrometry confirmationen
dc.typeArtigo
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
S0100-40422002000200008.pdf
Tamanho:
194.49 KB
Formato:
Adobe Portable Document Format
Baixar
Licença do Pacote
Agora exibindo 1 - 2 de 2
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:

Coleções

Artigos - Química Orgânica - IQ