A micro-impinger sampling device for determination of atmospheric nitrogen dioxide
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4209/aaqr.2019.06.0318 http://hdl.handle.net/11449/201294 |
Resumo: | There is an increasing demand for the determination of gaseous pollutants present in both outdoor and indoor environments. It is the result of a growing awareness that good air quality is fundamental to the health of the population. Gas monitors capable of reliable measurements are a global necessity. In this work, we developed a low cost and portable microsampler for gaseous pollutants, using a µ-impinger bubbler containing 500 µL of absorbing reagent. The microsampler was evaluated in the detection of NO2 using the Griess-Saltzman reagent (GS). The µ-impinger enabled the determination of NO2 concentrations lower than 15 µg m–3 (~8 ppb) using a 50 mL min–1 sample flow rate during 30 min. This NO2 concentration is 10 times lower than the EPA air quality standard. In the calibration procedure, standard atmospheres with NO2 concentrations from 15 to 165 µg m–3 were used. The limit of detection was 14 µg m–3 considering 3.3 times the standard deviation of the blank signal. The relative error was 12.0%, and the coefficient of variation was 6.9%. The portable sampling procedure can be used in remote areas where there is no public electricity supply. The detection limit could be improved further by using longer sampling times and/or higher sampling flow rates. The method is selective and highly sensitive. |
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A micro-impinger sampling device for determination of atmospheric nitrogen dioxideAir analysisGas samplersNO2 determinationµ-Impinger bubblerThere is an increasing demand for the determination of gaseous pollutants present in both outdoor and indoor environments. It is the result of a growing awareness that good air quality is fundamental to the health of the population. Gas monitors capable of reliable measurements are a global necessity. In this work, we developed a low cost and portable microsampler for gaseous pollutants, using a µ-impinger bubbler containing 500 µL of absorbing reagent. The microsampler was evaluated in the detection of NO2 using the Griess-Saltzman reagent (GS). The µ-impinger enabled the determination of NO2 concentrations lower than 15 µg m–3 (~8 ppb) using a 50 mL min–1 sample flow rate during 30 min. This NO2 concentration is 10 times lower than the EPA air quality standard. In the calibration procedure, standard atmospheres with NO2 concentrations from 15 to 165 µg m–3 were used. The limit of detection was 14 µg m–3 considering 3.3 times the standard deviation of the blank signal. The relative error was 12.0%, and the coefficient of variation was 6.9%. The portable sampling procedure can be used in remote areas where there is no public electricity supply. The detection limit could be improved further by using longer sampling times and/or higher sampling flow rates. The method is selective and highly sensitive.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Institute of Chemistry São Paulo State University (UNESP)Institute of Chemistry São Paulo State University (UNESP)CAPES: 1094/2013FAPESP: 2015/2326-5CNPq: 310065/2016-0Universidade Estadual Paulista (Unesp)Filho, Juliano Passaretti [UNESP]Costa, Maria Angélica Martins [UNESP]Cardoso, Arnaldo Alves [UNESP]2020-12-12T02:28:59Z2020-12-12T02:28:59Z2019-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2597-2603http://dx.doi.org/10.4209/aaqr.2019.06.0318Aerosol and Air Quality Research, v. 19, n. 11, p. 2597-2603, 2019.2071-14091680-8584http://hdl.handle.net/11449/20129410.4209/aaqr.2019.06.03182-s2.0-85074441384Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAerosol and Air Quality Researchinfo:eu-repo/semantics/openAccess2021-10-22T16:53:59Zoai:repositorio.unesp.br:11449/201294Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-22T16:53:59Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
title |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
spellingShingle |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide Filho, Juliano Passaretti [UNESP] Air analysis Gas samplers NO2 determination µ-Impinger bubbler |
title_short |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
title_full |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
title_fullStr |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
title_full_unstemmed |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
title_sort |
A micro-impinger sampling device for determination of atmospheric nitrogen dioxide |
author |
Filho, Juliano Passaretti [UNESP] |
author_facet |
Filho, Juliano Passaretti [UNESP] Costa, Maria Angélica Martins [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author_role |
author |
author2 |
Costa, Maria Angélica Martins [UNESP] Cardoso, Arnaldo Alves [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Filho, Juliano Passaretti [UNESP] Costa, Maria Angélica Martins [UNESP] Cardoso, Arnaldo Alves [UNESP] |
dc.subject.por.fl_str_mv |
Air analysis Gas samplers NO2 determination µ-Impinger bubbler |
topic |
Air analysis Gas samplers NO2 determination µ-Impinger bubbler |
description |
There is an increasing demand for the determination of gaseous pollutants present in both outdoor and indoor environments. It is the result of a growing awareness that good air quality is fundamental to the health of the population. Gas monitors capable of reliable measurements are a global necessity. In this work, we developed a low cost and portable microsampler for gaseous pollutants, using a µ-impinger bubbler containing 500 µL of absorbing reagent. The microsampler was evaluated in the detection of NO2 using the Griess-Saltzman reagent (GS). The µ-impinger enabled the determination of NO2 concentrations lower than 15 µg m–3 (~8 ppb) using a 50 mL min–1 sample flow rate during 30 min. This NO2 concentration is 10 times lower than the EPA air quality standard. In the calibration procedure, standard atmospheres with NO2 concentrations from 15 to 165 µg m–3 were used. The limit of detection was 14 µg m–3 considering 3.3 times the standard deviation of the blank signal. The relative error was 12.0%, and the coefficient of variation was 6.9%. The portable sampling procedure can be used in remote areas where there is no public electricity supply. The detection limit could be improved further by using longer sampling times and/or higher sampling flow rates. The method is selective and highly sensitive. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11-01 2020-12-12T02:28:59Z 2020-12-12T02:28:59Z |
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/10.4209/aaqr.2019.06.0318 Aerosol and Air Quality Research, v. 19, n. 11, p. 2597-2603, 2019. 2071-1409 1680-8584 http://hdl.handle.net/11449/201294 10.4209/aaqr.2019.06.0318 2-s2.0-85074441384 |
url |
http://dx.doi.org/10.4209/aaqr.2019.06.0318 http://hdl.handle.net/11449/201294 |
identifier_str_mv |
Aerosol and Air Quality Research, v. 19, n. 11, p. 2597-2603, 2019. 2071-1409 1680-8584 10.4209/aaqr.2019.06.0318 2-s2.0-85074441384 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aerosol and Air Quality Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2597-2603 |
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_ |
1799965047344070656 |