The chemical generation of NO for the determination of nitrite by high-resolution continuum source molecular absorption spectrometry
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
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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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 |
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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 |
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openAccess |
dc.source.pt_BR.fl_str_mv |
http://dx.doi.org/ 10.1016/j.talanta.2012.06.080 |
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reponame:Repositório Institucional da UFBA instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
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Universidade Federal da Bahia (UFBA) |
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UFBA |
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Repositório Institucional da UFBA |
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Repositório Institucional da UFBA |
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