Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages

Detalhes bibliográficos
Autor(a) principal: Vicente,Simone
Data de Publicação: 2006
Outros Autores: Zagatto,Elias A.G., Pinto,Paula C.A.G., Saraiva,Maria Lucia M.E.S., Lima,José L.F.C., Borges,Eduardo P.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Anais da Academia Brasileira de Ciências (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100004
Resumo: A tubular gas diffusion PTFE membrane is exploited for non-invasive sampling in flow analysis, aiming to develop an improved spectrophotometric determination of ethanol in alcoholic beverages. The probe is immersed into the sample, allowing ethanol to diffuse through the membrane. It is collected into the acceptor stream (acidic dichromate solution), leading to formation of Cr(III), monitored at 600 nm. The analytical curve is linear up to 50% (v/v) ethanol, baseline drift is < 0.005 absorbance during four working-hours, and sample throughput is 30 h-1, meaning 0.6 mmol K2Cr2O7 per determination. Results are precise (r.s.d.< 2%) and in agreement with an official procedure.
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spelling Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beveragesFlow-injection analysisethanol determinationgas diffusionsemi-permeable membraneUVVis spectrophotometryA tubular gas diffusion PTFE membrane is exploited for non-invasive sampling in flow analysis, aiming to develop an improved spectrophotometric determination of ethanol in alcoholic beverages. The probe is immersed into the sample, allowing ethanol to diffuse through the membrane. It is collected into the acceptor stream (acidic dichromate solution), leading to formation of Cr(III), monitored at 600 nm. The analytical curve is linear up to 50% (v/v) ethanol, baseline drift is < 0.005 absorbance during four working-hours, and sample throughput is 30 h-1, meaning 0.6 mmol K2Cr2O7 per determination. Results are precise (r.s.d.< 2%) and in agreement with an official procedure.Academia Brasileira de Ciências2006-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100004Anais da Academia Brasileira de Ciências v.78 n.1 2006reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/S0001-37652006000100004info:eu-repo/semantics/openAccessVicente,SimoneZagatto,Elias A.G.Pinto,Paula C.A.G.Saraiva,Maria Lucia M.E.S.Lima,José L.F.C.Borges,Eduardo P.eng2006-03-08T00:00:00Zoai:scielo:S0001-37652006000100004Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2006-03-08T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false
dc.title.none.fl_str_mv Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
title Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
spellingShingle Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
Vicente,Simone
Flow-injection analysis
ethanol determination
gas diffusion
semi-permeable membrane
UVVis spectrophotometry
title_short Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
title_full Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
title_fullStr Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
title_full_unstemmed Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
title_sort Exploiting gas diffusion for non-invasive sampling in flow analysis: determination of ethanol in alcoholic beverages
author Vicente,Simone
author_facet Vicente,Simone
Zagatto,Elias A.G.
Pinto,Paula C.A.G.
Saraiva,Maria Lucia M.E.S.
Lima,José L.F.C.
Borges,Eduardo P.
author_role author
author2 Zagatto,Elias A.G.
Pinto,Paula C.A.G.
Saraiva,Maria Lucia M.E.S.
Lima,José L.F.C.
Borges,Eduardo P.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Vicente,Simone
Zagatto,Elias A.G.
Pinto,Paula C.A.G.
Saraiva,Maria Lucia M.E.S.
Lima,José L.F.C.
Borges,Eduardo P.
dc.subject.por.fl_str_mv Flow-injection analysis
ethanol determination
gas diffusion
semi-permeable membrane
UVVis spectrophotometry
topic Flow-injection analysis
ethanol determination
gas diffusion
semi-permeable membrane
UVVis spectrophotometry
description A tubular gas diffusion PTFE membrane is exploited for non-invasive sampling in flow analysis, aiming to develop an improved spectrophotometric determination of ethanol in alcoholic beverages. The probe is immersed into the sample, allowing ethanol to diffuse through the membrane. It is collected into the acceptor stream (acidic dichromate solution), leading to formation of Cr(III), monitored at 600 nm. The analytical curve is linear up to 50% (v/v) ethanol, baseline drift is < 0.005 absorbance during four working-hours, and sample throughput is 30 h-1, meaning 0.6 mmol K2Cr2O7 per determination. Results are precise (r.s.d.< 2%) and in agreement with an official procedure.
publishDate 2006
dc.date.none.fl_str_mv 2006-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100004
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100004
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0001-37652006000100004
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Academia Brasileira de Ciências
publisher.none.fl_str_mv Academia Brasileira de Ciências
dc.source.none.fl_str_mv Anais da Academia Brasileira de Ciências v.78 n.1 2006
reponame:Anais da Academia Brasileira de Ciências (Online)
instname:Academia Brasileira de Ciências (ABC)
instacron:ABC
instname_str Academia Brasileira de Ciências (ABC)
instacron_str ABC
institution ABC
reponame_str Anais da Academia Brasileira de Ciências (Online)
collection Anais da Academia Brasileira de Ciências (Online)
repository.name.fl_str_mv Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)
repository.mail.fl_str_mv ||aabc@abc.org.br
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