Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide

Detalhes bibliográficos
Autor(a) principal: Milani, Márcio Raimundo
Data de Publicação: 2003
Outros Autores: Cardoso, Arnaldo Alves
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/4520
http://dx.doi.org/10.1016/S0026-265X(02)00173-X
Resumo: A nephelometric technique based on a liquid drop is described for the measurement of atmospheric sulfur dioxide. A 40-ml drop of barium chloride and hydrogen peroxide solution is suspended in a flowing-air sampling stream. The sulfur (IV) collected is oxidized to sulfur (VI) and finally precipitated as barium sulfate. Nephelometric detection of drop is achieved by an appropriate arrangement consisting of an optical fiber contacting the drop and a photodiode placed at 908 relative to the fiber. The design and characteristics of this drop-based gas sensor system are described. The analytical response, as photocurrent, is proportional to the product of the sampling period and the sulfur dioxide concentration. The detection limit is ca. 1.1 mg my3 for a 10-min sampling time. The present technique is fairly rapid and simple, uses a small amount of reagent and is set up with low-cost equipment, making this system economically viable.
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spelling Construction and performance of a drop cell for the nephelometric determination of sulfur dioxideNephelometrySulfur dioxide determinationDrop analysisA nephelometric technique based on a liquid drop is described for the measurement of atmospheric sulfur dioxide. A 40-ml drop of barium chloride and hydrogen peroxide solution is suspended in a flowing-air sampling stream. The sulfur (IV) collected is oxidized to sulfur (VI) and finally precipitated as barium sulfate. Nephelometric detection of drop is achieved by an appropriate arrangement consisting of an optical fiber contacting the drop and a photodiode placed at 908 relative to the fiber. The design and characteristics of this drop-based gas sensor system are described. The analytical response, as photocurrent, is proportional to the product of the sampling period and the sulfur dioxide concentration. The detection limit is ca. 1.1 mg my3 for a 10-min sampling time. The present technique is fairly rapid and simple, uses a small amount of reagent and is set up with low-cost equipment, making this system economically viable.2014-08-22T17:48:49Z2014-08-22T17:48:49Z2003info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfMILANI, Márcio Raimundo; CARDOSO, Arnaldo Alves. Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide. Microchemical Journal, v. 74, n. 1, p. 75-82, 2003. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0026265X0200173X>. Acesso em: 31 maio 2014.0026-265Xhttp://repositorio.furg.br/handle/1/4520http://dx.doi.org/10.1016/S0026-265X(02)00173-XengMilani, Márcio RaimundoCardoso, Arnaldo Alvesinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2014-08-22T17:48:49Zoai:repositorio.furg.br:1/4520Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2014-08-22T17:48:49Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
title Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
spellingShingle Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
Milani, Márcio Raimundo
Nephelometry
Sulfur dioxide determination
Drop analysis
title_short Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
title_full Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
title_fullStr Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
title_full_unstemmed Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
title_sort Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
author Milani, Márcio Raimundo
author_facet Milani, Márcio Raimundo
Cardoso, Arnaldo Alves
author_role author
author2 Cardoso, Arnaldo Alves
author2_role author
dc.contributor.author.fl_str_mv Milani, Márcio Raimundo
Cardoso, Arnaldo Alves
dc.subject.por.fl_str_mv Nephelometry
Sulfur dioxide determination
Drop analysis
topic Nephelometry
Sulfur dioxide determination
Drop analysis
description A nephelometric technique based on a liquid drop is described for the measurement of atmospheric sulfur dioxide. A 40-ml drop of barium chloride and hydrogen peroxide solution is suspended in a flowing-air sampling stream. The sulfur (IV) collected is oxidized to sulfur (VI) and finally precipitated as barium sulfate. Nephelometric detection of drop is achieved by an appropriate arrangement consisting of an optical fiber contacting the drop and a photodiode placed at 908 relative to the fiber. The design and characteristics of this drop-based gas sensor system are described. The analytical response, as photocurrent, is proportional to the product of the sampling period and the sulfur dioxide concentration. The detection limit is ca. 1.1 mg my3 for a 10-min sampling time. The present technique is fairly rapid and simple, uses a small amount of reagent and is set up with low-cost equipment, making this system economically viable.
publishDate 2003
dc.date.none.fl_str_mv 2003
2014-08-22T17:48:49Z
2014-08-22T17:48:49Z
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 MILANI, Márcio Raimundo; CARDOSO, Arnaldo Alves. Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide. Microchemical Journal, v. 74, n. 1, p. 75-82, 2003. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0026265X0200173X>. Acesso em: 31 maio 2014.
0026-265X
http://repositorio.furg.br/handle/1/4520
http://dx.doi.org/10.1016/S0026-265X(02)00173-X
identifier_str_mv MILANI, Márcio Raimundo; CARDOSO, Arnaldo Alves. Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide. Microchemical Journal, v. 74, n. 1, p. 75-82, 2003. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0026265X0200173X>. Acesso em: 31 maio 2014.
0026-265X
url http://repositorio.furg.br/handle/1/4520
http://dx.doi.org/10.1016/S0026-265X(02)00173-X
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
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