On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry

Detalhes bibliográficos
Autor(a) principal: Ferreira, Sergio Luis Costa
Data de Publicação: 2001
Outros Autores: Santos, Walter Nei Lopes dos, Lemos, Valfredo Azevedo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/7623
Resumo: Texto completo: acesso restrito. p. 145–151
id UFBA-2_2159f34be52606f2488077b014c07f20
oai_identifier_str oai:repositorio.ufba.br:ri/7623
network_acronym_str UFBA-2
network_name_str Repositório Institucional da UFBA
repository_id_str 1932
spelling Ferreira, Sergio Luis CostaSantos, Walter Nei Lopes dosLemos, Valfredo AzevedoFerreira, Sergio Luis CostaSantos, Walter Nei Lopes dosLemos, Valfredo Azevedo2012-12-17T18:25:33Z20010003-2670http://www.repositorio.ufba.br/ri/handle/ri/7623v. 445, n. 2Texto completo: acesso restrito. p. 145–151An on-line preconcentration system for nickel determination in natural foods has been developed. In it nickel(II) ions are fixed on a minicolumn packed with Amberlite XAD-2 loaded with 2-(2-benzothiazolylazo)-2-p-cresol (BTAC) through complexation process. Afterwards, nickel is eluted with 0.10 mol l−1 hydrochloric acid and determinated by flame atomic absorption spectrometry (FAAS). Chemical and flow variables, as well as common interferences effect, were studied. Nickel can be preconcentrated with an enrichment factor of 30, for a sample volume of 7.0 ml and a preconcentration time of 1 min. In these experimental conditions, the method provides a linear relationship between absorbance and nickel concentration in the range from 5.0 to 250.0 μg l−1, with a detection limit (3σ) of 1.1 μg l−1. The precision (assessed as the relative standard deviation (R.S.D.)) for seven independent determinations reached values of 5.0–0.9% in nickel solutions of 5.0–250.0 μg l−1 concentration, respectively. Achieved sampling rate was 48 samples/h. The enrichment factor and the detection limit can be further improved by increasing preconcentration time without degradation in the efficiency, due to the favorable kinetics and low hydrodynamic impedance of the present system. The nickel determination in four reference materials: spinach leaves (NIST 1570), orchard leaves (NIST 1571), peach leaves (NIST 1547) and rice flour (NIES 10), confirmed the accuracy of the proposed procedure. These results demonstrate also that the method is tolerant the presence of others metal ions in proportions agreeing with biological samples. Achieved recoveries of nickel in several natural food samples, measured by standard addition technique, proved also that this procedure is not affected by matrix interferences and can be applied satisfactorily for food analysis.Submitted by Suelen Reis (suelen_suzane@hotmail.com) on 2012-12-17T18:25:33Z No. of bitstreams: 1 1-s2.0-S0003267001012624-main.pdf: 61771 bytes, checksum: 1af4033c1e17200bcb1bf1d7b9103251 (MD5)Made available in DSpace on 2012-12-17T18:25:33Z (GMT). No. of bitstreams: 1 1-s2.0-S0003267001012624-main.pdf: 61771 bytes, checksum: 1af4033c1e17200bcb1bf1d7b9103251 (MD5) Previous issue date: 2001http://dx.doi.org/10.1016/S0003-2670(01)01262-4reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAOn-line preconcentration systemNickel determinationFlame atomic adsorption spectrometryOn-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometryAnalytica Chimica Actainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINAL1-s2.0-S0003267001012624-main.pdf1-s2.0-S0003267001012624-main.pdfapplication/pdf61771https://repositorio.ufba.br/bitstream/ri/7623/1/1-s2.0-S0003267001012624-main.pdf1af4033c1e17200bcb1bf1d7b9103251MD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/7623/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXT1-s2.0-S0003267001012624-main.pdf.txt1-s2.0-S0003267001012624-main.pdf.txtExtracted texttext/plain24456https://repositorio.ufba.br/bitstream/ri/7623/3/1-s2.0-S0003267001012624-main.pdf.txt7e2c0b93b68a6b41265f6022313e3d15MD53ri/76232022-07-05 14:03:34.227oai:repositorio.ufba.br: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Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:34Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
dc.title.alternative.pt_BR.fl_str_mv Analytica Chimica Acta
title On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
spellingShingle On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
Ferreira, Sergio Luis Costa
On-line preconcentration system
Nickel determination
Flame atomic adsorption spectrometry
title_short On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
title_full On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
title_fullStr On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
title_full_unstemmed On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
title_sort On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry
author Ferreira, Sergio Luis Costa
author_facet Ferreira, Sergio Luis Costa
Santos, Walter Nei Lopes dos
Lemos, Valfredo Azevedo
author_role author
author2 Santos, Walter Nei Lopes dos
Lemos, Valfredo Azevedo
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, Sergio Luis Costa
Santos, Walter Nei Lopes dos
Lemos, Valfredo Azevedo
Ferreira, Sergio Luis Costa
Santos, Walter Nei Lopes dos
Lemos, Valfredo Azevedo
dc.subject.por.fl_str_mv On-line preconcentration system
Nickel determination
Flame atomic adsorption spectrometry
topic On-line preconcentration system
Nickel determination
Flame atomic adsorption spectrometry
description Texto completo: acesso restrito. p. 145–151
publishDate 2001
dc.date.issued.fl_str_mv 2001
dc.date.accessioned.fl_str_mv 2012-12-17T18:25:33Z
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://www.repositorio.ufba.br/ri/handle/ri/7623
dc.identifier.issn.none.fl_str_mv 0003-2670
dc.identifier.number.pt_BR.fl_str_mv v. 445, n. 2
identifier_str_mv 0003-2670
v. 445, n. 2
url http://www.repositorio.ufba.br/ri/handle/ri/7623
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/S0003-2670(01)01262-4
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
bitstream.url.fl_str_mv https://repositorio.ufba.br/bitstream/ri/7623/1/1-s2.0-S0003267001012624-main.pdf
https://repositorio.ufba.br/bitstream/ri/7623/2/license.txt
https://repositorio.ufba.br/bitstream/ri/7623/3/1-s2.0-S0003267001012624-main.pdf.txt
bitstream.checksum.fl_str_mv 1af4033c1e17200bcb1bf1d7b9103251
1b89a9a0548218172d7c829f87a0eab9
7e2c0b93b68a6b41265f6022313e3d15
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
MD5
repository.name.fl_str_mv Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)
repository.mail.fl_str_mv
_version_ 1801502462185570304

Registros relacionados