J. Phys. IV France 125 (2005) 829-832
Attempt for percentile analysis of food colorants with photoacoustic methodT.M. Coelho1, E.C. Vidotti2, M.C.E. Rollemberg2, M.L. Baesso1 and A.C. Bento1
1 Departamento de Física, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-Paraná, 87020-900, Brazil
2 Departamento de Química, Universidade Estadual de Maringá, Av. Colombo 5790, Maringá-Paraná, 87020-900. Brazil
In this work the photoacoustic (PAS) method is applied in polyester-type polyurethane foam (PUF) doped with food colorants. Aiming to resolve binary mixtures of synthetic colorants such as Sunset Yellow, Tartrazine, Brilliant Blue and Amaranth, a single spectroscopic method is described. Based upon individual spectra, a Gaussian deconvolution is used and the fraction of each colorant is found.
© EDP Sciences 2005