Simple Methods Via Mid-ir Or 1h Nmr Spectroscopy For The Determination Of The Iodine Value Of Vegetable Oils

dc.date2015
dc.date2016-06-03T20:13:32Z
dc.date2016-06-03T20:13:32Z
dc.date.accessioned2018-03-29T01:32:39Z
dc.date.available2018-03-29T01:32:39Z
dc.identifier
dc.identifierJournal Of The Brazilian Chemical Society. Sociedade Brasileira De Quimica, v. 26, n. 7, p. 1431 - 1437, 2015.
dc.identifier1035053
dc.identifier10.5935/0103-5053.20150111
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84936942232&partnerID=40&md5=72bb3683d239eec7534831ec07b0540d
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/238075
dc.identifier2-s2.0-84936942232
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1304736
dc.descriptionTwo methods for determining the iodine value in vegetable oils are described. One employs mid-infrared (mid-IR) spectroscopy and the other uses hydrogen nuclear magnetic resonance (1H NMR). The determination of the iodine value is based on either the transmittance intensity of mid-IR signals or on the 1H NMR signal integration and multivariate calibration. Both of the methods showed adequate coefficients of determination (r2 = 0.9974 and 0.9978, respectively) when compared to Wijs method, which is recommended by the norm EN 14111. A statistical comparison between the results from the proposed methods and from Wijs method shows that both instrumental methods offer equivalent results and greater precisions compared to Wijs method. The regressions obtained from the constructed models were considered statistically significant and useful for making predictions. The proposed methods present several advantages compared to Wijs method because they significantly reduce analysis time, reagent consumption and waste generation. Furthermore, an analyst can choose between the mid-IR or 1H NMR to determine the iodine value. ©2015 Sociedade Brasileira de Química.
dc.description26
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dc.description
dc.languageen
dc.publisherSociedade Brasileira de Quimica
dc.relationJournal of the Brazilian Chemical Society
dc.rightsfechado
dc.sourceScopus
dc.titleSimple Methods Via Mid-ir Or 1h Nmr Spectroscopy For The Determination Of The Iodine Value Of Vegetable Oils
dc.typeArtículos de revistas


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