Construction and performance of a drop cell for the nephelometric determination of sulfur dioxide
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
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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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 |
eu_rights_str_mv |
openAccess |
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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1813187265078231040 |