Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
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=S0103-50532022000700783 |
Resumo: | Thermal infrared enthalpimetry (TIE) was used for hypochlorite determination in commercial hypochlorite-based bleaching solutions. Experimental parameters were evaluated for the reaction with a hydrogen peroxide solution. The most relevant conditions were 5% H2O2 (m/m) solution, stirring speed of 250 rpm, dispensing rate of 0.57 mL s-1, and 10 s after reaction for the simultaneous temperature readings of four replicates. Agreement to reference method NBR 9425 ranging from 98.2 to 103.2% was achieved, with a low variation among measurements (relative standard deviation < 3.5%). The number of analytical operations was reduced, and only H2O2 solution was required as a greener reagent. A low amount of residues was generated (2.4 and 152.8 mL for each replicate in TIE and official method, respectively), and the application of the green analytical procedure index (GAPI) showed the greenness of the proposed method. |
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Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutionsactive chlorinethermal infrared enthalpimetryquality controlgreen chemistrythermographyThermal infrared enthalpimetry (TIE) was used for hypochlorite determination in commercial hypochlorite-based bleaching solutions. Experimental parameters were evaluated for the reaction with a hydrogen peroxide solution. The most relevant conditions were 5% H2O2 (m/m) solution, stirring speed of 250 rpm, dispensing rate of 0.57 mL s-1, and 10 s after reaction for the simultaneous temperature readings of four replicates. Agreement to reference method NBR 9425 ranging from 98.2 to 103.2% was achieved, with a low variation among measurements (relative standard deviation < 3.5%). The number of analytical operations was reduced, and only H2O2 solution was required as a greener reagent. A low amount of residues was generated (2.4 and 152.8 mL for each replicate in TIE and official method, respectively), and the application of the green analytical procedure index (GAPI) showed the greenness of the proposed method.Sociedade Brasileira de Química2022-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532022000700783Journal of the Brazilian Chemical Society v.33 n.7 2022reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0103-5053.20220054info:eu-repo/semantics/openAccessNora,Flavia M. DallaOliveira,Alessandra S.Duarte,Fabio A.Cichoski,Alexandre J.Barin,Juliano S.eng2022-06-15T00:00:00Zoai:scielo:S0103-50532022000700783Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2022-06-15T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
title |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
spellingShingle |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions Nora,Flavia M. Dalla active chlorine thermal infrared enthalpimetry quality control green chemistry thermography |
title_short |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
title_full |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
title_fullStr |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
title_full_unstemmed |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
title_sort |
Thermal Infrared Enthalpimetry Method for the Determination of Hypochlorite in Bleaching Solutions |
author |
Nora,Flavia M. Dalla |
author_facet |
Nora,Flavia M. Dalla Oliveira,Alessandra S. Duarte,Fabio A. Cichoski,Alexandre J. Barin,Juliano S. |
author_role |
author |
author2 |
Oliveira,Alessandra S. Duarte,Fabio A. Cichoski,Alexandre J. Barin,Juliano S. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Nora,Flavia M. Dalla Oliveira,Alessandra S. Duarte,Fabio A. Cichoski,Alexandre J. Barin,Juliano S. |
dc.subject.por.fl_str_mv |
active chlorine thermal infrared enthalpimetry quality control green chemistry thermography |
topic |
active chlorine thermal infrared enthalpimetry quality control green chemistry thermography |
description |
Thermal infrared enthalpimetry (TIE) was used for hypochlorite determination in commercial hypochlorite-based bleaching solutions. Experimental parameters were evaluated for the reaction with a hydrogen peroxide solution. The most relevant conditions were 5% H2O2 (m/m) solution, stirring speed of 250 rpm, dispensing rate of 0.57 mL s-1, and 10 s after reaction for the simultaneous temperature readings of four replicates. Agreement to reference method NBR 9425 ranging from 98.2 to 103.2% was achieved, with a low variation among measurements (relative standard deviation < 3.5%). The number of analytical operations was reduced, and only H2O2 solution was required as a greener reagent. A low amount of residues was generated (2.4 and 152.8 mL for each replicate in TIE and official method, respectively), and the application of the green analytical procedure index (GAPI) showed the greenness of the proposed method. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-07-01 |
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=S0103-50532022000700783 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532022000700783 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.21577/0103-5053.20220054 |
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.33 n.7 2022 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 |
_version_ |
1750318184891678720 |