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Please use this identifier to cite or link to this item: http://dspace.utalca.cl/handle/1950/10082

Title: The binding of 4-ethylguaiacol with polyaniline-based materials in wines
Authors: Marican, A.
Carrasco-Sanchez, V.
John, A.
Laurie, VF.
Santos, LS.
Keywords: Polyaniline
Wine; 4-EG
Conjugated polymers
Issue Date: 15-Sep-2014
Citation: FOOD CHEMISTRY 159 :486-492
Abstract: 4-ethylguaiacol (4-EG) is one of the important compounds responsible for the "Brett character" (i.e. spicy and smoky aromas) found in wines contaminated with Brettanomyces yeast. In this trial, the ability of polyaniline-based materials (PANI-EB and PANI-ES) was tested as a potential fining agent for the removal of 4-EG in wine. First, a screening study was developed in order to determine the binding capacity of 4-EG by PANI materials in 12% ethanol solution. Then, the capturing ability of PANI against 4-EG was evaluated with a solution containing gallic acid (GA), 4-methyl-catechol (4-MC), in which the concentration of the phenolic compounds were maintained as in the real wine. The results obtained showed that the retention percentage varied between 0 to 100% (4-EG), 13.81% to 72.32% (GA), and 0 to 17.39% (4-MC), depending on the interaction time and amount of the PANI used. Finally, the capturing capacity of PANI-EB and PANI-ES against 4-EG was evaluated in a real wine sample containing originally 3.10 +/- 0.13 mg L-1 of 4-EG and 2.55 +/- 0.10 g L-1 of other total phenolic compounds. The analyses performed indicated that PANI-EB is more effective in removing 4-EG than PANI-ES, with retention percentages varying between 36 and 50%. (C) 2014 Elsevier Ltd. All rights reserved.
Description: Marican, A (Marican, Adolfo) Univ Talca, Chem Inst Nat Resources, Lab Asymmetr Synth, Santiago, Chile Mostrar los nombres mejorados para organizaciones. Carrasco-Sanchez, V (Carrasco-Sanchez, Veronica) Univ Talca, Nanobiotechnol Div, Fraunhofer Chile Res Fdn Ctr Syst Biotechnol FCR, Talca, Chile Mostrar los nombres mejorados para organizaciones. Laurie, VF (Laurie, V. Felipe) Univ Talca, Sch Agr Sci, Santiago, Chile
URI: http://dspace.utalca.cl/handle/1950/10082
ISSN: 0308-8146
Appears in Collections:Artículos en publicaciones ISI - Universidad de Talca

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