Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0103-50532004000500011 http://hdl.handle.net/11449/67858 |
Resumo: | In this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60 μL volumes were sequentially injected into the atomizer preheated to a temperature of 110°C. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L-1), and a surfactant, Triton X-100 (0.3% v v-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5 μL s-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 μg L-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 μg L-1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample. |
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Repositório Institucional da UNESP |
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Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tubeETAASHot injectionPreconcentrationUrineVanadiumbarium derivativebarium difluoridegraphitetriton x 100unclassified drugvanadiumaccuracyatomic absorption spectrometrydilutionflow rateinjectionurinalysisIn this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60 μL volumes were sequentially injected into the atomizer preheated to a temperature of 110°C. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L-1), and a surfactant, Triton X-100 (0.3% v v-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5 μL s-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 μg L-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 μg L-1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample.Departamento de Química Univ. Federal de São Carlos, CP 676, 13560-970 São Carlos - SPEmbrapa Pecuária Sudeste, CP 339, 13560-970 São Carlos - SPInstituto de Química Universidade Estadual Paulista, CP 355, 14560-970 Araraquara - SPInstituto de Química Universidade Estadual Paulista, CP 355, 14560-970 Araraquara - SPUniversidade Federal de São Carlos (UFSCar)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Universidade Estadual Paulista (Unesp)Fernandes, Kelly G.Nogueira, Ana Rita A.Gomes Neto, José A. [UNESP]Nóbrega, Joaquim A.2014-05-27T11:21:08Z2014-05-27T11:21:08Z2004-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article676-681application/pdfhttp://dx.doi.org/10.1590/S0103-50532004000500011Journal of the Brazilian Chemical Society, v. 15, n. 5, p. 676-681, 2004.0103-5053http://hdl.handle.net/11449/6785810.1590/S0103-50532004000500011S0103-50532004000500011WOS:0002249588000112-s2.0-96443008872-s2.0-9644300887.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2023-10-18T06:11:12Zoai:repositorio.unesp.br:11449/67858Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-18T06:11:12Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
title |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
spellingShingle |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube Fernandes, Kelly G. ETAAS Hot injection Preconcentration Urine Vanadium barium derivative barium difluoride graphite triton x 100 unclassified drug vanadium accuracy atomic absorption spectrometry dilution flow rate injection urinalysis |
title_short |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
title_full |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
title_fullStr |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
title_full_unstemmed |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
title_sort |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube |
author |
Fernandes, Kelly G. |
author_facet |
Fernandes, Kelly G. Nogueira, Ana Rita A. Gomes Neto, José A. [UNESP] Nóbrega, Joaquim A. |
author_role |
author |
author2 |
Nogueira, Ana Rita A. Gomes Neto, José A. [UNESP] Nóbrega, Joaquim A. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Fernandes, Kelly G. Nogueira, Ana Rita A. Gomes Neto, José A. [UNESP] Nóbrega, Joaquim A. |
dc.subject.por.fl_str_mv |
ETAAS Hot injection Preconcentration Urine Vanadium barium derivative barium difluoride graphite triton x 100 unclassified drug vanadium accuracy atomic absorption spectrometry dilution flow rate injection urinalysis |
topic |
ETAAS Hot injection Preconcentration Urine Vanadium barium derivative barium difluoride graphite triton x 100 unclassified drug vanadium accuracy atomic absorption spectrometry dilution flow rate injection urinalysis |
description |
In this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60 μL volumes were sequentially injected into the atomizer preheated to a temperature of 110°C. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L-1), and a surfactant, Triton X-100 (0.3% v v-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5 μL s-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 μg L-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 μg L-1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-09-01 2014-05-27T11:21:08Z 2014-05-27T11:21:08Z |
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 |
http://dx.doi.org/10.1590/S0103-50532004000500011 Journal of the Brazilian Chemical Society, v. 15, n. 5, p. 676-681, 2004. 0103-5053 http://hdl.handle.net/11449/67858 10.1590/S0103-50532004000500011 S0103-50532004000500011 WOS:000224958800011 2-s2.0-9644300887 2-s2.0-9644300887.pdf |
url |
http://dx.doi.org/10.1590/S0103-50532004000500011 http://hdl.handle.net/11449/67858 |
identifier_str_mv |
Journal of the Brazilian Chemical Society, v. 15, n. 5, p. 676-681, 2004. 0103-5053 10.1590/S0103-50532004000500011 S0103-50532004000500011 WOS:000224958800011 2-s2.0-9644300887 2-s2.0-9644300887.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Chemical Society 1.444 0,357 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
676-681 application/pdf |
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_ |
1803649454282113024 |