Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/231725 |
Resumo: | A comparative study is reported between C18 bonded silica gel and powdered polyethylene (PE) as sorbent for Cd, Cu, and Pb determination using ammonium diethyldithiophosphate (ADTP) as the complexing agent in a flow injection system. The complexes were formed in 0.14 mol L-1 HNO 3 and processed in a simple flow system comprising a peristaltic pump, a manual injector-commutator, and a sorbent-packed mini-column. Ethanol was selected as the eluent and analytes in the eluate were determined by flame atomic absorption spectrometry. The optimum concentration of the complexing agent was 0.1% (m/v) ADTP for Cu and Pb determination using either C 18 or PE, and 0.25% (m/v) ADTP for Cd determination using PE. The sample loading flow rates were 5.0, 3.6, and 3.0 mL min-1 for Cu, Pb, and Cd, respectively. The best elution flow rate was 6.5 mL min-1 For a 60-sec preconcentration time, the sampling rate was 40 h-1 and the enrichment factors of 33, 36, and 11 times (C18) or 18, 22, and 23 times (PE) were obtained for Cu, Pb, and Cd, respectively. The limits of detection (LOD) were 1.6 μg L-1 Cu, 11 μg L-1 Pb, and 2.0 μg L-1 Cd using C18 or 2.9 μg L -1 Cu, 19 μg L-1 Pb, and 1.0 μg L-1 Cd using PE, respectively. The relative standard deviations (n = 12) were typically <2%, <2%, and <6% for Cd, Cu, and Pb, respectively. The recoveries of Cd, Cu, and Pb added to wine samples varied from 96-99%, 97-102%, and 90-99%, respectively, using C18 or PE. Accuracy was checked for Cd, Cu, and Pb determination in six wine samples digested by block digestor and open-vessel microwave-assisted digestion systems. The results revealed that C18 was more efficient for Cu and Pb determination, while PE was the best sorbent for Cd. |
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Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase ExtractionA comparative study is reported between C18 bonded silica gel and powdered polyethylene (PE) as sorbent for Cd, Cu, and Pb determination using ammonium diethyldithiophosphate (ADTP) as the complexing agent in a flow injection system. The complexes were formed in 0.14 mol L-1 HNO 3 and processed in a simple flow system comprising a peristaltic pump, a manual injector-commutator, and a sorbent-packed mini-column. Ethanol was selected as the eluent and analytes in the eluate were determined by flame atomic absorption spectrometry. The optimum concentration of the complexing agent was 0.1% (m/v) ADTP for Cu and Pb determination using either C 18 or PE, and 0.25% (m/v) ADTP for Cd determination using PE. The sample loading flow rates were 5.0, 3.6, and 3.0 mL min-1 for Cu, Pb, and Cd, respectively. The best elution flow rate was 6.5 mL min-1 For a 60-sec preconcentration time, the sampling rate was 40 h-1 and the enrichment factors of 33, 36, and 11 times (C18) or 18, 22, and 23 times (PE) were obtained for Cu, Pb, and Cd, respectively. The limits of detection (LOD) were 1.6 μg L-1 Cu, 11 μg L-1 Pb, and 2.0 μg L-1 Cd using C18 or 2.9 μg L -1 Cu, 19 μg L-1 Pb, and 1.0 μg L-1 Cd using PE, respectively. The relative standard deviations (n = 12) were typically <2%, <2%, and <6% for Cd, Cu, and Pb, respectively. The recoveries of Cd, Cu, and Pb added to wine samples varied from 96-99%, 97-102%, and 90-99%, respectively, using C18 or PE. Accuracy was checked for Cd, Cu, and Pb determination in six wine samples digested by block digestor and open-vessel microwave-assisted digestion systems. The results revealed that C18 was more efficient for Cu and Pb determination, while PE was the best sorbent for Cd.Instituto de Química Universidade Estadual Paulista, P.O. Box 355, 14801-970 Araraquara-SPInstituto de Química Universidade Estadual Paulista, P.O. Box 355, 14801-970 Araraquara-SPUniversidade Estadual Paulista (UNESP)Pires Fernandes, Andréa [UNESP]De Moraes, Mercedes [UNESP]Gomes Neto, José Anchieta [UNESP]2022-04-29T08:47:14Z2022-04-29T08:47:14Z2003-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article179-184Atomic Spectroscopy, v. 24, n. 5, p. 179-184, 2003.0195-5373http://hdl.handle.net/11449/2317252-s2.0-0345688086Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAtomic Spectroscopyinfo:eu-repo/semantics/openAccess2022-04-29T08:47:14Zoai:repositorio.unesp.br:11449/231725Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:40:07.419849Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
title |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
spellingShingle |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction Pires Fernandes, Andréa [UNESP] |
title_short |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
title_full |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
title_fullStr |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
title_full_unstemmed |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
title_sort |
Flow Injection AAS Determination of Cd, Cu, and Pb at Trace Levels in Wine Using Solid Phase Extraction |
author |
Pires Fernandes, Andréa [UNESP] |
author_facet |
Pires Fernandes, Andréa [UNESP] De Moraes, Mercedes [UNESP] Gomes Neto, José Anchieta [UNESP] |
author_role |
author |
author2 |
De Moraes, Mercedes [UNESP] Gomes Neto, José Anchieta [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Pires Fernandes, Andréa [UNESP] De Moraes, Mercedes [UNESP] Gomes Neto, José Anchieta [UNESP] |
description |
A comparative study is reported between C18 bonded silica gel and powdered polyethylene (PE) as sorbent for Cd, Cu, and Pb determination using ammonium diethyldithiophosphate (ADTP) as the complexing agent in a flow injection system. The complexes were formed in 0.14 mol L-1 HNO 3 and processed in a simple flow system comprising a peristaltic pump, a manual injector-commutator, and a sorbent-packed mini-column. Ethanol was selected as the eluent and analytes in the eluate were determined by flame atomic absorption spectrometry. The optimum concentration of the complexing agent was 0.1% (m/v) ADTP for Cu and Pb determination using either C 18 or PE, and 0.25% (m/v) ADTP for Cd determination using PE. The sample loading flow rates were 5.0, 3.6, and 3.0 mL min-1 for Cu, Pb, and Cd, respectively. The best elution flow rate was 6.5 mL min-1 For a 60-sec preconcentration time, the sampling rate was 40 h-1 and the enrichment factors of 33, 36, and 11 times (C18) or 18, 22, and 23 times (PE) were obtained for Cu, Pb, and Cd, respectively. The limits of detection (LOD) were 1.6 μg L-1 Cu, 11 μg L-1 Pb, and 2.0 μg L-1 Cd using C18 or 2.9 μg L -1 Cu, 19 μg L-1 Pb, and 1.0 μg L-1 Cd using PE, respectively. The relative standard deviations (n = 12) were typically <2%, <2%, and <6% for Cd, Cu, and Pb, respectively. The recoveries of Cd, Cu, and Pb added to wine samples varied from 96-99%, 97-102%, and 90-99%, respectively, using C18 or PE. Accuracy was checked for Cd, Cu, and Pb determination in six wine samples digested by block digestor and open-vessel microwave-assisted digestion systems. The results revealed that C18 was more efficient for Cu and Pb determination, while PE was the best sorbent for Cd. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-09-01 2022-04-29T08:47:14Z 2022-04-29T08:47:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Atomic Spectroscopy, v. 24, n. 5, p. 179-184, 2003. 0195-5373 http://hdl.handle.net/11449/231725 2-s2.0-0345688086 |
identifier_str_mv |
Atomic Spectroscopy, v. 24, n. 5, p. 179-184, 2003. 0195-5373 2-s2.0-0345688086 |
url |
http://hdl.handle.net/11449/231725 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Atomic Spectroscopy |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
179-184 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128233851322368 |