Spectroscopic and photothermal characterization of annatto: Applications in functional foods

Autor(es)

Santos, Leticia F. ; Dias, Vanessa M. ; Pilla, Viviane ; Andrade, Acacio A. ; Alves, Leandro P. ; Munin, Egberto ; Monteiro, Viviane S. ; Zilio, Sergio C.

• Tipo de documento: Artigo Científico
• Fonte: DYES AND PIGMENTS; v. 110, p. 8-pg., 2014-11-01.

Resumo

Dyes are among the most common additives used primarily to intensify, compensate or add color to manufactured products. The major color detected in annatto seeds conies from carotenoids bixin (C25H30O4) and norbixin (C24H28O4), depending on the extraction method. This article presents absorption and fluorescence spectroscopic characterizations of annatto extracted in aqueous solutions from seeds of the tropical shrub Bixa orellana L. Extractions from seeds were performed using aqueous solution (at 98 degrees C) with different potential of hydrogen values (pH 6.5-11.2), and the results were compared to those obtained with chemical extraction methods using other solvents. Thermo-optical parameters, such as refractive index temperature coefficient (dn/dT), thermal diffusivity (D), fraction thermal load (phi) and quantum yield (eta) were determined for annatto solutions. Finally, the effectiveness of using of different concentrations of annatto dye in bread preparation is investigated as a functional food possibility. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 06/01277-2 - Espectroscopia não linear em nanocristais semicondutores funcionalizados para aplicações
• Beneficiário: Viviane Pilla
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 96/05590-3 - Implementação de laboratório para caracterização de processos ablativos com laser em tecidos biológicos
• Beneficiário: Egberto Munin
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 01/12754-2 - Desenvolvimento de tecnicas opticas para caracterizacao de alteracoes induzidas por irradiacao laser em organismos de elevada capacidade regenerativa.
• Beneficiário: Egberto Munin
• Modalidade de apoio: Auxílio à Pesquisa - Regular