The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry

Detalhes bibliográficos
Autor(a) principal: Ferreira, Sergio Luis Costa
Data de Publicação: 2012
Outros Autores: Brandão, Geovani Cardoso, Lima, Daniel C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://repositorio.ufba.br/ri/handle/ri/15211
Resumo: Texto completo: acesso restrito. p. 231–235
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spelling Ferreira, Sergio Luis CostaBrandão, Geovani CardosoLima, Daniel C.Ferreira, Sergio Luis CostaBrandão, Geovani CardosoLima, Daniel C.2014-07-15T16:56:38Z20120039-9140http://repositorio.ufba.br/ri/handle/ri/15211v. 98Texto completo: acesso restrito. p. 231–235In the present work, we propose a method for the determination of nitrite based on the chemical generation of nitric oxide (NO) and its detection by high-resolution continuum source molecular absorption spectrometry. NO is generated by the reduction of nitrite in acidic media with ascorbic acid as the reducing agent and then transferred into a quartz cell by a stream of argon carrier gas. The conditions under which the NO is generated are as follows: 0.4 mol L−1 hydrochloric acid, 1.5% (w/v) ascorbic acid, an argon gas pressure of 0.03 MPa and an injection time of the reducing agent of 4 s. All measurements of molecular absorption were performed using the NO line at 215.360 nm, and the signal was measured by peak height. Under these conditions, the method described has limits of detection and quantification of 0.045 and 0.150 μg mL−1 of nitrite, respectively. The calibration curve is linear for nitrite concentrations in the range 0.15–15 μg mL−1. The precision, estimated as the relative standard deviation (RSD), was 3.5% and 4.4% for solutions with nitrite concentrations of 0.5 and 5.0 μg mL−1, respectively. This method was applied to the analysis of different water samples (well water, drinking water and river water) collected in Cachoeira City, Bahia State, Brazil. The results were in agreement with those obtained by a spectrophotometric method using the Griess reaction. Addition/recovery tests were also performed to check the validity of the proposed method. Recoveries of 93–106% were achieved.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2014-07-15T16:56:38Z No. of bitstreams: 1 Sergio L.C. Ferreira.pdf: 495671 bytes, checksum: 7fd25bb65ad7fc0e807e58d17225c3d1 (MD5)Made available in DSpace on 2014-07-15T16:56:38Z (GMT). No. of bitstreams: 1 Sergio L.C. Ferreira.pdf: 495671 bytes, checksum: 7fd25bb65ad7fc0e807e58d17225c3d1 (MD5) Previous issue date: 2012http://dx.doi.org/ 10.1016/j.talanta.2012.06.080reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBAChemical generationNitric oxideDetermination of nitriteHigh-resolution continuum source atomic absorption spectrometryThe chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometryTalantainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01info:eu-repo/semantics/openAccessengORIGINALSergio L.C. Ferreira.pdfSergio L.C. 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dc.title.pt_BR.fl_str_mv The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
dc.title.alternative.pt_BR.fl_str_mv Talanta
title The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
spellingShingle The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
Ferreira, Sergio Luis Costa
Chemical generation
Nitric oxide
Determination of nitrite
High-resolution continuum source atomic absorption spectrometry
title_short The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
title_full The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
title_fullStr The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
title_full_unstemmed The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
title_sort The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
author Ferreira, Sergio Luis Costa
author_facet Ferreira, Sergio Luis Costa
Brandão, Geovani Cardoso
Lima, Daniel C.
author_role author
author2 Brandão, Geovani Cardoso
Lima, Daniel C.
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, Sergio Luis Costa
Brandão, Geovani Cardoso
Lima, Daniel C.
Ferreira, Sergio Luis Costa
Brandão, Geovani Cardoso
Lima, Daniel C.
dc.subject.por.fl_str_mv Chemical generation
Nitric oxide
Determination of nitrite
High-resolution continuum source atomic absorption spectrometry
topic Chemical generation
Nitric oxide
Determination of nitrite
High-resolution continuum source atomic absorption spectrometry
description Texto completo: acesso restrito. p. 231–235
publishDate 2012
dc.date.issued.fl_str_mv 2012
dc.date.accessioned.fl_str_mv 2014-07-15T16:56:38Z
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://repositorio.ufba.br/ri/handle/ri/15211
dc.identifier.issn.none.fl_str_mv 0039-9140
dc.identifier.number.pt_BR.fl_str_mv v. 98
identifier_str_mv 0039-9140
v. 98
url http://repositorio.ufba.br/ri/handle/ri/15211
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/j.talanta.2012.06.080
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instname:Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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