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dc.contributor.authorKollar, Sara Regina Moraispt_BR
dc.contributor.authorNovotny, Etelvino H.pt_BR
dc.contributor.authorNascimento, Cláudia Jorge dopt_BR
dc.contributor.authorSuarez, Paulo Anselmo Zianipt_BR
dc.date.accessioned2018-01-04T19:14:43Z-
dc.date.available2018-01-04T19:14:43Z-
dc.date.issued2017-10pt_BR
dc.identifier.citationKOLLAR, 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.pt_BR
dc.identifier.urihttp://repositorio.unb.br/handle/10482/30694-
dc.language.isoenpt_BR
dc.publisherSociedade Brasileira de Químicapt_BR
dc.rightsAcesso Abertopt_BR
dc.titleNuclear 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 reactionpt_BR
dc.typeArtigopt_BR
dc.subject.keywordBiodieselpt_BR
dc.subject.keywordEsterificaçãopt_BR
dc.subject.keywordQuimiometriapt_BR
dc.rights.licenseJournal 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.-
dc.identifier.doihttp://dx.doi.org/10.21577/0103-5053.20170031pt_BR
dc.description.abstract1In 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.-
dc.description.unidadeInstituto de Química (IQ)pt_BR
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