Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/79928
Type: Artigo de periódico
Title: Efficiencies of Acid and Base-Catalyzed Methylation of Vegetable Oils by Ambient Mass Spectrometry
Author: Santos, OO
Montanher, PF
Bonafe, EG
Maruyama, SA
Carbonera, F
Alberici, RM
Eberlin, MN
Visentainer, JV
Abstract: The fatty acids (FA) profile is an important parameter for quality control and typification for foods in general. These profiles work as a sort of 'fingerprint', and may be useful to monitor frauds and deterioration of diverse types of foods. For vegetable oils, the FA profile is commonly determined after hydrolysis, methylation and gas chromatography (GC) analysis. In this work, the acid and base-catalyzed soybean oil methylation methods was monitored via GC-FID and also by ambient sonic-spray ionization mass spectrometry (EASI-MS). The base-catalyzed method is much superior regarding other esterification assays, because it is cheaper, less toxic, no oxidation products are formed and its reaction yield is greater (95.66% m/m against 92.86% and 94.51% from acid-catalyzed methylation methods, respectively).
Subject: hydroperoxides
soybean oil
acid and base-catalyzed methylation
ambient mass spectrometry
Country: Brasil
Editor: Soc Brasileira Quimica
Rights: aberto
Identifier DOI: 10.5935/0103-5053.20130221
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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