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Spectrophotometric resolution of ternary mixtures of amaranth, Carmoisine and Ponceau 4R by the derivative ratio spectrum-zero crossing method

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  • Organic/Dye Chemistry
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Abstract

A method for the simultaneous determination of Amaranth, Ponceau 4R and Carmoisine dyes in ternary mixtures is proposed, with no separation step; this is based on the simultaneous use of the first derivative of ratio spectra and measurements at zero-crossing wavelengths. The calibration graphs are linear up to 32 mg/L of Amaranth, Carmoisine and Ponceau 4R. The mean recovery is 102.1, 95.3 and 102.6 %, respectively. The method was applied to several food products.

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Authors and Affiliations

  1. Department of Analytical Chemistry and Food Technology, University of Castilla-La Mancha, E-13071, Ciudad Real, Spain

    J. J. Berzas Nevado, C. Guiberteau Cabanillas & A. M. Contento Salcedo

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  1. J. J. Berzas Nevado
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  2. C. Guiberteau Cabanillas
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  3. A. M. Contento Salcedo
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Nevado, J.J.B., Cabanillas, C.G. & Salcedo, A.M.C. Spectrophotometric resolution of ternary mixtures of amaranth, Carmoisine and Ponceau 4R by the derivative ratio spectrum-zero crossing method. Fresenius J Anal Chem 350, 606–609 (1994). https://doi.org/10.1007/BF00323511

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  • DOI: https://doi.org/10.1007/BF00323511

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