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dc.contributor.authorPassaretti Filho, Juliano-
dc.contributor.authorSilveira Petruci, Joao Flavio da-
dc.contributor.authorCardoso, Arnaldo Alves-
dc.identifier.citationTalanta. Amsterdam: Elsevier Science Bv, v. 140, p. 73-80, 2015.-
dc.description.abstractNitrogen dioxide (NO2) is an important indicator of atmospheric pollution that is mainly derived from combustion processes. The gas is often present at undesirable levels in both open and closed environments worldwide, requiring monitoring under a variety of different conditions. This work describes the development of a sensitive, selective, and inexpensive method for the determination of NO2 in gaseous samples. The method is based on the processing of digital images of the product of the Griess-Saltzman (GS) colorimetric reaction. NO2 was collected and pre-concentrated using C-18 cartridges impregnated with triethanolamine, followed by elution with 5% methanol solution. The reaction for formation of the colored product only required 300 mu L volumes of sample containing reagent, minimizing the generation of chemical wastes. Calibrations using standard atmospheres showed that it was possible to measure NO2 in a concentration range from 5.1 to 100.0 ppb (9.4-188.0 mu g m(-3)), using a sampling flow rate of 0.50 L min(-1) and a collection time of 60 min. The limit of detection achieved with a solution volume of 300 mu L. was 5.0 ppb (9.6 mu g m(-3)), with a relative error of 2% and a coefficient of variation of 1.6%.en
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectAir pollutionen
dc.subjectNitrogen dioxideen
dc.subjectDigital imageen
dc.titleDevelopment of a simple method for determination of NO2 in air using digital scanner imagesen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationSão Paulo State University (UNESP) - Department of Analytical Chemistry, CEP 14800-970 Araraquara, SP, Brazil-
dc.description.affiliationUnespSão Paulo State University (UNESP) - Department of Analytical Chemistry, CEP 14800-970 Araraquara, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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