Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UnB |
Texto Completo: | http://repositorio.unb.br/handle/10482/30694 http://dx.doi.org/10.21577/0103-5053.20170031 |
Resumo: | In this work, we compared 1.40 T nuclear magnetic resonance (NMR) to 7.05 T (60 and 300 MHz for proton, respectively), and mid-infrared with attenuated total reflectance (FTIR-ATR), associated with chemometrics methods, for the quantification of the reaction yield during esterification of fatty acids with methanol. The results showed that the integrated intensities of the ester C=O stretching region, relative to the total C=O stretching region, is useful to quantify the fatty acid methyl ester (FAME) concentration. Comparing the results obtained by the different final models: NMR (1.40 T and 7.05 T), FTIR-ATR using multivariate partial last squares regression (PLS) with orthogonal signal correction (OSC), and univariate ordinary least squares (OLS), the NMR of 1.40 T (60 MHz for proton) showed more advantages when compared to a high field spectrometer, due to the non-use of cryogenic and solvents and less laborious work for obtaining results. |
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Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reactionBiodieselEsterificaçãoQuimiometriaIn this work, we compared 1.40 T nuclear magnetic resonance (NMR) to 7.05 T (60 and 300 MHz for proton, respectively), and mid-infrared with attenuated total reflectance (FTIR-ATR), associated with chemometrics methods, for the quantification of the reaction yield during esterification of fatty acids with methanol. The results showed that the integrated intensities of the ester C=O stretching region, relative to the total C=O stretching region, is useful to quantify the fatty acid methyl ester (FAME) concentration. Comparing the results obtained by the different final models: NMR (1.40 T and 7.05 T), FTIR-ATR using multivariate partial last squares regression (PLS) with orthogonal signal correction (OSC), and univariate ordinary least squares (OLS), the NMR of 1.40 T (60 MHz for proton) showed more advantages when compared to a high field spectrometer, due to the non-use of cryogenic and solvents and less laborious work for obtaining results.Instituto de Química (IQ)Sociedade Brasileira de Química2018-01-04T19:14:43Z2018-01-04T19:14:43Z2017-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfKOLLAR, Sara R. M. et al. Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction. Journal of the Brazilian Chemical Society, São Paulo, v. 28, n. 10, p. 1917-1925, out. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017001001917&lng=en&nrm=iso>. Acesso em: 1 fev. 2018. doi: http://dx.doi.org/10.21577/0103-5053.20170031.http://repositorio.unb.br/handle/10482/30694http://dx.doi.org/10.21577/0103-5053.20170031Journal of the Brazilian Chemical Society - This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017001001917&lng=en&nrm=iso. Acesso em: 1 fev. 2018.info:eu-repo/semantics/openAccessKollar, Sara Regina MoraisNovotny, Etelvino H.Nascimento, Cláudia Jorge doSuarez, Paulo Anselmo Zianiengreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNB2023-10-20T13:58:51Zoai:repositorio.unb.br:10482/30694Repositório InstitucionalPUBhttps://repositorio.unb.br/oai/requestrepositorio@unb.bropendoar:2023-10-20T13:58:51Repositório Institucional da UnB - Universidade de Brasília (UnB)false |
dc.title.none.fl_str_mv |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
title |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
spellingShingle |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction Kollar, Sara Regina Morais Biodiesel Esterificação Quimiometria |
title_short |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
title_full |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
title_fullStr |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
title_full_unstemmed |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
title_sort |
Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction |
author |
Kollar, Sara Regina Morais |
author_facet |
Kollar, Sara Regina Morais Novotny, Etelvino H. Nascimento, Cláudia Jorge do Suarez, Paulo Anselmo Ziani |
author_role |
author |
author2 |
Novotny, Etelvino H. Nascimento, Cláudia Jorge do Suarez, Paulo Anselmo Ziani |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Kollar, Sara Regina Morais Novotny, Etelvino H. Nascimento, Cláudia Jorge do Suarez, Paulo Anselmo Ziani |
dc.subject.por.fl_str_mv |
Biodiesel Esterificação Quimiometria |
topic |
Biodiesel Esterificação Quimiometria |
description |
In this work, we compared 1.40 T nuclear magnetic resonance (NMR) to 7.05 T (60 and 300 MHz for proton, respectively), and mid-infrared with attenuated total reflectance (FTIR-ATR), associated with chemometrics methods, for the quantification of the reaction yield during esterification of fatty acids with methanol. The results showed that the integrated intensities of the ester C=O stretching region, relative to the total C=O stretching region, is useful to quantify the fatty acid methyl ester (FAME) concentration. Comparing the results obtained by the different final models: NMR (1.40 T and 7.05 T), FTIR-ATR using multivariate partial last squares regression (PLS) with orthogonal signal correction (OSC), and univariate ordinary least squares (OLS), the NMR of 1.40 T (60 MHz for proton) showed more advantages when compared to a high field spectrometer, due to the non-use of cryogenic and solvents and less laborious work for obtaining results. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-10 2018-01-04T19:14:43Z 2018-01-04T19:14:43Z |
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 |
KOLLAR, Sara R. M. et al. Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction. Journal of the Brazilian Chemical Society, São Paulo, v. 28, n. 10, p. 1917-1925, out. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017001001917&lng=en&nrm=iso>. Acesso em: 1 fev. 2018. doi: http://dx.doi.org/10.21577/0103-5053.20170031. http://repositorio.unb.br/handle/10482/30694 http://dx.doi.org/10.21577/0103-5053.20170031 |
identifier_str_mv |
KOLLAR, Sara R. M. et al. Nuclear magnetic resonance (1.40 T) and mid infrared (FTIR-ATR) associated with chemometrics as analytical methods for the analysis of methyl ester yield obtained by esterification reaction. Journal of the Brazilian Chemical Society, São Paulo, v. 28, n. 10, p. 1917-1925, out. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532017001001917&lng=en&nrm=iso>. Acesso em: 1 fev. 2018. doi: http://dx.doi.org/10.21577/0103-5053.20170031. |
url |
http://repositorio.unb.br/handle/10482/30694 http://dx.doi.org/10.21577/0103-5053.20170031 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 |
reponame:Repositório Institucional da UnB instname:Universidade de Brasília (UnB) instacron:UNB |
instname_str |
Universidade de Brasília (UnB) |
instacron_str |
UNB |
institution |
UNB |
reponame_str |
Repositório Institucional da UnB |
collection |
Repositório Institucional da UnB |
repository.name.fl_str_mv |
Repositório Institucional da UnB - Universidade de Brasília (UnB) |
repository.mail.fl_str_mv |
repositorio@unb.br |
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1810580817032773632 |