Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel

Detalhes bibliográficos
Autor(a) principal: Atilio, Natalia Cambiaghi
Data de Publicação: 2022
Outros Autores: Fertonani, Fernando Luis [UNESP], Oliveira, Elcio Cruz de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.3390/molecules27228048
http://hdl.handle.net/11449/249405
Resumo: One of the quality control parameters of ethanol fuel is pH, established by the Brazilian standard ABNT NBR 10891, whose scope is specific for hydrated ethanol fuel, and by the American standard ASTM D 6423, which focuses on anhydrous ethanol fuel. This study presented a modified and optimized structure using a single solvent, both for the glass electrode and the external reference electrode, to minimize the presence of the liquid junction potential for measuring the pH of hydrated ethanol fuel. The Box–Behnken design enabled us to determine the optimal condition expected for the new measurement system, which was compared with the systems proposed by the standard references and the turning range of acid–base indicators using parametric and nonparametric tests. The results revealed that the pH values obtained by the different systems are statistically different, and that only the values obtained by this proposal are suitable for the pH range found by the indicators. The optimized electrode presented an adequate response sensitivity to the Nernst equation, having an operational behavior adequate for the modified and optimized glass electrode for pH measurements in hydrated ethanol fuel.
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spelling Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuelchemometricsethanol pHhydrous ethanol fuelmetrologymodified and optimized glass electrodepH indicatorsOne of the quality control parameters of ethanol fuel is pH, established by the Brazilian standard ABNT NBR 10891, whose scope is specific for hydrated ethanol fuel, and by the American standard ASTM D 6423, which focuses on anhydrous ethanol fuel. This study presented a modified and optimized structure using a single solvent, both for the glass electrode and the external reference electrode, to minimize the presence of the liquid junction potential for measuring the pH of hydrated ethanol fuel. The Box–Behnken design enabled us to determine the optimal condition expected for the new measurement system, which was compared with the systems proposed by the standard references and the turning range of acid–base indicators using parametric and nonparametric tests. The results revealed that the pH values obtained by the different systems are statistically different, and that only the values obtained by this proposal are suitable for the pH range found by the indicators. The optimized electrode presented an adequate response sensitivity to the Nernst equation, having an operational behavior adequate for the modified and optimized glass electrode for pH measurements in hydrated ethanol fuel.Postgraduate Programme in Metrology Pontifical Catholic University of Rio de JaneiroBiosciences Languages and Exact Sciences Institute (Ibilce) São Paulo State University (Unesp), Rua Cristovão Colombo, 2265, Jardim NazarethLogistics Operational Planning and Control Measurement and Product Inventory Management PETROBRAS S.ABiosciences Languages and Exact Sciences Institute (Ibilce) São Paulo State University (Unesp), Rua Cristovão Colombo, 2265, Jardim NazarethPontifical Catholic University of Rio de JaneiroUniversidade Estadual Paulista (UNESP)PETROBRAS S.AAtilio, Natalia CambiaghiFertonani, Fernando Luis [UNESP]Oliveira, Elcio Cruz de2023-07-29T15:15:12Z2023-07-29T15:15:12Z2022-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/molecules27228048Molecules, v. 27, n. 22, 2022.1420-3049http://hdl.handle.net/11449/24940510.3390/molecules272280482-s2.0-85142621301Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMoleculesinfo:eu-repo/semantics/openAccess2023-07-29T15:15:12Zoai:repositorio.unesp.br:11449/249405Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:33:46.516254Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
title Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
spellingShingle Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
Atilio, Natalia Cambiaghi
chemometrics
ethanol pH
hydrous ethanol fuel
metrology
modified and optimized glass electrode
pH indicators
title_short Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
title_full Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
title_fullStr Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
title_full_unstemmed Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
title_sort Modified and Optimized Glass Electrode for pH Measurements in Hydrated Ethanol Fuel
author Atilio, Natalia Cambiaghi
author_facet Atilio, Natalia Cambiaghi
Fertonani, Fernando Luis [UNESP]
Oliveira, Elcio Cruz de
author_role author
author2 Fertonani, Fernando Luis [UNESP]
Oliveira, Elcio Cruz de
author2_role author
author
dc.contributor.none.fl_str_mv Pontifical Catholic University of Rio de Janeiro
Universidade Estadual Paulista (UNESP)
PETROBRAS S.A
dc.contributor.author.fl_str_mv Atilio, Natalia Cambiaghi
Fertonani, Fernando Luis [UNESP]
Oliveira, Elcio Cruz de
dc.subject.por.fl_str_mv chemometrics
ethanol pH
hydrous ethanol fuel
metrology
modified and optimized glass electrode
pH indicators
topic chemometrics
ethanol pH
hydrous ethanol fuel
metrology
modified and optimized glass electrode
pH indicators
description One of the quality control parameters of ethanol fuel is pH, established by the Brazilian standard ABNT NBR 10891, whose scope is specific for hydrated ethanol fuel, and by the American standard ASTM D 6423, which focuses on anhydrous ethanol fuel. This study presented a modified and optimized structure using a single solvent, both for the glass electrode and the external reference electrode, to minimize the presence of the liquid junction potential for measuring the pH of hydrated ethanol fuel. The Box–Behnken design enabled us to determine the optimal condition expected for the new measurement system, which was compared with the systems proposed by the standard references and the turning range of acid–base indicators using parametric and nonparametric tests. The results revealed that the pH values obtained by the different systems are statistically different, and that only the values obtained by this proposal are suitable for the pH range found by the indicators. The optimized electrode presented an adequate response sensitivity to the Nernst equation, having an operational behavior adequate for the modified and optimized glass electrode for pH measurements in hydrated ethanol fuel.
publishDate 2022
dc.date.none.fl_str_mv 2022-11-01
2023-07-29T15:15:12Z
2023-07-29T15:15:12Z
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 http://dx.doi.org/10.3390/molecules27228048
Molecules, v. 27, n. 22, 2022.
1420-3049
http://hdl.handle.net/11449/249405
10.3390/molecules27228048
2-s2.0-85142621301
url http://dx.doi.org/10.3390/molecules27228048
http://hdl.handle.net/11449/249405
identifier_str_mv Molecules, v. 27, n. 22, 2022.
1420-3049
10.3390/molecules27228048
2-s2.0-85142621301
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Molecules
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808128827003502592

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