Método potenciométrico para determinação de cobre em cachaça

Detalhes bibliográficos
Autor(a) principal: Küchler,Ivo L.
Data de Publicação: 1999
Outros Autores: Silva,Fernando Antônio M.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421999000300010
Resumo: 'Cachaça' is the Brazilian name for the spirit obtained from sugarcane. According to Brazilian regulations, it may be sold raw or with addition of sugar and may contain up to 5 mg/L of copper. Copper in "cachaça" was determined by titration with EDTA, using a homemade copper membrane electrode for end-point detection. It was found a pooled standard deviation of 0,057 mg/L and there was no significant difference between the results obtained by the potentiometric method and by flame atomic absorption spectrometry with standard addition. Among the 21 'cachaça' samples from 16 different brands analyzed, three overpassed the legal copper limit. For its characteristics of accuracy, precision, and speed, the potentiometric method may be employed advantageously in routine analysis, specially when low cost is a major concern.
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spelling Método potenciométrico para determinação de cobre em cachaçacopper electrodeEDTA titrationsugarcane spirit'Cachaça' is the Brazilian name for the spirit obtained from sugarcane. According to Brazilian regulations, it may be sold raw or with addition of sugar and may contain up to 5 mg/L of copper. Copper in "cachaça" was determined by titration with EDTA, using a homemade copper membrane electrode for end-point detection. It was found a pooled standard deviation of 0,057 mg/L and there was no significant difference between the results obtained by the potentiometric method and by flame atomic absorption spectrometry with standard addition. Among the 21 'cachaça' samples from 16 different brands analyzed, three overpassed the legal copper limit. For its characteristics of accuracy, precision, and speed, the potentiometric method may be employed advantageously in routine analysis, specially when low cost is a major concern.Sociedade Brasileira de Química1999-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421999000300010Química Nova v.22 n.3 1999reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40421999000300010info:eu-repo/semantics/openAccessKüchler,Ivo L.Silva,Fernando Antônio M.por2000-05-03T00:00:00Zoai:scielo:S0100-40421999000300010Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2000-05-03T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Método potenciométrico para determinação de cobre em cachaça
title Método potenciométrico para determinação de cobre em cachaça
spellingShingle Método potenciométrico para determinação de cobre em cachaça
Küchler,Ivo L.
copper electrode
EDTA titration
sugarcane spirit
title_short Método potenciométrico para determinação de cobre em cachaça
title_full Método potenciométrico para determinação de cobre em cachaça
title_fullStr Método potenciométrico para determinação de cobre em cachaça
title_full_unstemmed Método potenciométrico para determinação de cobre em cachaça
title_sort Método potenciométrico para determinação de cobre em cachaça
author Küchler,Ivo L.
author_facet Küchler,Ivo L.
Silva,Fernando Antônio M.
author_role author
author2 Silva,Fernando Antônio M.
author2_role author
dc.contributor.author.fl_str_mv Küchler,Ivo L.
Silva,Fernando Antônio M.
dc.subject.por.fl_str_mv copper electrode
EDTA titration
sugarcane spirit
topic copper electrode
EDTA titration
sugarcane spirit
description 'Cachaça' is the Brazilian name for the spirit obtained from sugarcane. According to Brazilian regulations, it may be sold raw or with addition of sugar and may contain up to 5 mg/L of copper. Copper in "cachaça" was determined by titration with EDTA, using a homemade copper membrane electrode for end-point detection. It was found a pooled standard deviation of 0,057 mg/L and there was no significant difference between the results obtained by the potentiometric method and by flame atomic absorption spectrometry with standard addition. Among the 21 'cachaça' samples from 16 different brands analyzed, three overpassed the legal copper limit. For its characteristics of accuracy, precision, and speed, the potentiometric method may be employed advantageously in routine analysis, specially when low cost is a major concern.
publishDate 1999
dc.date.none.fl_str_mv 1999-06-01
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=S0100-40421999000300010
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40421999000300010
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40421999000300010
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 Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv Química Nova v.22 n.3 1999
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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