A micro-impinger sampling device for determination of atmospheric nitrogen dioxide

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorFilho, Juliano Passaretti [UNESP]-
Autor(es): dc.creatorCosta, Maria Angélica Martins [UNESP]-
Autor(es): dc.creatorCardoso, Arnaldo Alves [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:33:09Z-
Data de disponibilização: dc.date.available2022-02-22T00:33:09Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.4209/aaqr.2019.06.0318-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/201294-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/201294-
Descrição: dc.descriptionThere 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.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP)-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP)-
Descrição: dc.descriptionCAPES: 1094/2013-
Descrição: dc.descriptionFAPESP: 2015/2326-5-
Descrição: dc.descriptionCNPq: 310065/2016-0-
Formato: dc.format2597-2603-
Idioma: dc.languageen-
Relação: dc.relationAerosol and Air Quality Research-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAir analysis-
Palavras-chave: dc.subjectGas samplers-
Palavras-chave: dc.subjectNO2 determination-
Palavras-chave: dc.subjectµ-Impinger bubbler-
Título: dc.titleA micro-impinger sampling device for determination of atmospheric nitrogen dioxide-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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