Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/219929 |
Resumo: | The objective of this work was to improve the method for determining the concentration of iron in accordance with standard ISO 9507: 1990 by potentiometric titration using automated chromatometry using a combined platinum electrode as indicator of analysis endpoint, coupled with reducing step performed by titanium chloride without heating of analysis solution (> 70°C). The potentiometric titration determines the final volume by the potential difference measured with high precision electrodes and calculated by derivative method with no need for color indicators and additional human intervention for endpoint indication, increasing precision and accuracy. The elimination of heating step represents a significant gain in time to perform the determination by increasing productivity of the laboratory. The use of only one solution of potassium dichromate on both titrations involving this titrant (instead of both diluted and concentrated titrant) decreases the time for solution preparation and reduces the number of burettes needed for the method. The results show the accuracy and precision of the automated system compared to reference standards used in laboratories of ores, proving no need of to heat up the sample solution during one of the steps of the method. |
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Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heatingChromatometryIron(II)PotentiometryTitrationThe objective of this work was to improve the method for determining the concentration of iron in accordance with standard ISO 9507: 1990 by potentiometric titration using automated chromatometry using a combined platinum electrode as indicator of analysis endpoint, coupled with reducing step performed by titanium chloride without heating of analysis solution (> 70°C). The potentiometric titration determines the final volume by the potential difference measured with high precision electrodes and calculated by derivative method with no need for color indicators and additional human intervention for endpoint indication, increasing precision and accuracy. The elimination of heating step represents a significant gain in time to perform the determination by increasing productivity of the laboratory. The use of only one solution of potassium dichromate on both titrations involving this titrant (instead of both diluted and concentrated titrant) decreases the time for solution preparation and reduces the number of burettes needed for the method. The results show the accuracy and precision of the automated system compared to reference standards used in laboratories of ores, proving no need of to heat up the sample solution during one of the steps of the method.Unicamp Metrohm Pensalab.Química pela Unesp Metrohm Pensalab.Química pela Unesp Metrohm Pensalab.Universidade Estadual de Campinas (UNICAMP)Universidade Estadual Paulista (UNESP)Simões, Eduardo HenriqueCaramello, Everton Luís [UNESP]Júnior, Ricardo Drozdowski [UNESP]Barrionuevo, Sandro Moreno [UNESP]2022-04-28T18:58:32Z2022-04-28T18:58:32Z2012-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject2525-25406th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore, v. 4, p. 2525-2540.http://hdl.handle.net/11449/2199292-s2.0-84883660340Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Oreinfo:eu-repo/semantics/openAccess2022-04-28T18:58:32Zoai:repositorio.unesp.br:11449/219929Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T18:58:32Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
title |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
spellingShingle |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating Simões, Eduardo Henrique Chromatometry Iron(II) Potentiometry Titration |
title_short |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
title_full |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
title_fullStr |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
title_full_unstemmed |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
title_sort |
Determination of iron(II) concentration by potentiometric titration of chromatometry with TICl2 reduction step without heating |
author |
Simões, Eduardo Henrique |
author_facet |
Simões, Eduardo Henrique Caramello, Everton Luís [UNESP] Júnior, Ricardo Drozdowski [UNESP] Barrionuevo, Sandro Moreno [UNESP] |
author_role |
author |
author2 |
Caramello, Everton Luís [UNESP] Júnior, Ricardo Drozdowski [UNESP] Barrionuevo, Sandro Moreno [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Simões, Eduardo Henrique Caramello, Everton Luís [UNESP] Júnior, Ricardo Drozdowski [UNESP] Barrionuevo, Sandro Moreno [UNESP] |
dc.subject.por.fl_str_mv |
Chromatometry Iron(II) Potentiometry Titration |
topic |
Chromatometry Iron(II) Potentiometry Titration |
description |
The objective of this work was to improve the method for determining the concentration of iron in accordance with standard ISO 9507: 1990 by potentiometric titration using automated chromatometry using a combined platinum electrode as indicator of analysis endpoint, coupled with reducing step performed by titanium chloride without heating of analysis solution (> 70°C). The potentiometric titration determines the final volume by the potential difference measured with high precision electrodes and calculated by derivative method with no need for color indicators and additional human intervention for endpoint indication, increasing precision and accuracy. The elimination of heating step represents a significant gain in time to perform the determination by increasing productivity of the laboratory. The use of only one solution of potassium dichromate on both titrations involving this titrant (instead of both diluted and concentrated titrant) decreases the time for solution preparation and reduces the number of burettes needed for the method. The results show the accuracy and precision of the automated system compared to reference standards used in laboratories of ores, proving no need of to heat up the sample solution during one of the steps of the method. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12-01 2022-04-28T18:58:32Z 2022-04-28T18:58:32Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore, v. 4, p. 2525-2540. http://hdl.handle.net/11449/219929 2-s2.0-84883660340 |
identifier_str_mv |
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore, v. 4, p. 2525-2540. 2-s2.0-84883660340 |
url |
http://hdl.handle.net/11449/219929 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
6th Int. Congress on the Science and Technology of Ironmaking 2012, ICSTI 2012 - Including Proceedings from the 42nd Ironmaking and Raw Materials Seminar, and the 13th Brazilian Symp. on Iron Ore |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2525-2540 |
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_ |
1799964699188527104 |