Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry

Detalhes bibliográficos
Autor(a) principal: Reis,Boaventura F.
Data de Publicação: 1997
Outros Autores: Vieira,Jonas A., Krug,Francisco José, Giné,Maria Fernanda
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Journal of the Brazilian Chemical Society (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000500015
Resumo: A flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry is described. The ammonia generated on line in an alkaline medium is permeated through a hydrophobic membrane (TPFE), collected by a deionized water stream and directed toward the conductivity flow cell. The flow network was designed with two analytical paths in order to increase the analytical throughput. The procedure was used to determine ammonium in 2 mol L-1 KCl soil extracts and allowed 100 determinations per hour with a relative standard deviation (r.s.d) of about 2% and an average recovery of 99.9% for a typical sample with concentration of 2.1 mg NH4+ L1-.
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spelling Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometryammonium determinationflow analysisconductometric detectionanalysis of soil extractsA flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry is described. The ammonia generated on line in an alkaline medium is permeated through a hydrophobic membrane (TPFE), collected by a deionized water stream and directed toward the conductivity flow cell. The flow network was designed with two analytical paths in order to increase the analytical throughput. The procedure was used to determine ammonium in 2 mol L-1 KCl soil extracts and allowed 100 determinations per hour with a relative standard deviation (r.s.d) of about 2% and an average recovery of 99.9% for a typical sample with concentration of 2.1 mg NH4+ L1-.Sociedade Brasileira de Química1997-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000500015Journal of the Brazilian Chemical Society v.8 n.5 1997reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50531997000500015info:eu-repo/semantics/openAccessReis,Boaventura F.Vieira,Jonas A.Krug,Francisco JoséGiné,Maria Fernandaeng2010-09-10T00:00:00Zoai:scielo:S0103-50531997000500015Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2010-09-10T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
title Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
spellingShingle Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
Reis,Boaventura F.
ammonium determination
flow analysis
conductometric detection
analysis of soil extracts
title_short Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
title_full Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
title_fullStr Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
title_full_unstemmed Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
title_sort Development of a flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry
author Reis,Boaventura F.
author_facet Reis,Boaventura F.
Vieira,Jonas A.
Krug,Francisco José
Giné,Maria Fernanda
author_role author
author2 Vieira,Jonas A.
Krug,Francisco José
Giné,Maria Fernanda
author2_role author
author
author
dc.contributor.author.fl_str_mv Reis,Boaventura F.
Vieira,Jonas A.
Krug,Francisco José
Giné,Maria Fernanda
dc.subject.por.fl_str_mv ammonium determination
flow analysis
conductometric detection
analysis of soil extracts
topic ammonium determination
flow analysis
conductometric detection
analysis of soil extracts
description A flow injection system with two analytical paths for ammonium determination in soil extracts by conductometry is described. The ammonia generated on line in an alkaline medium is permeated through a hydrophobic membrane (TPFE), collected by a deionized water stream and directed toward the conductivity flow cell. The flow network was designed with two analytical paths in order to increase the analytical throughput. The procedure was used to determine ammonium in 2 mol L-1 KCl soil extracts and allowed 100 determinations per hour with a relative standard deviation (r.s.d) of about 2% and an average recovery of 99.9% for a typical sample with concentration of 2.1 mg NH4+ L1-.
publishDate 1997
dc.date.none.fl_str_mv 1997-01-01
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=S0103-50531997000500015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000500015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-50531997000500015
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 Journal of the Brazilian Chemical Society v.8 n.5 1997
reponame:Journal of the Brazilian Chemical Society (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Journal of the Brazilian Chemical Society (Online)
collection Journal of the Brazilian Chemical Society (Online)
repository.name.fl_str_mv Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv ||office@jbcs.sbq.org.br
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