Derivative spectrophotometric resolution of mixtures of the food colourants Tartrazine, Amaranth and Curcumin in a micellar medium
1996; Elsevier BV; Volume: 43; Issue: 7 Linguagem: Inglês
10.1016/0039-9140(96)01847-4
ISSN1873-3573
AutoresC CRUCESBLANCO, Ana M. Garcı́a-Campaña, Fermín Alés‐Barrero,
Tópico(s)Biochemical effects in animals
ResumoA study of the absorption spectra of the food colourants Tartrazine (E-102), Amaranth (E-123) and Curcumin (E-100) in various organic solvents and pH media, have been carried out. In addition, the spectral behaviour in aqueous micellar systems of anionic, cationic and non-ionic surfactants, as well as beta-cyclodextrin, was investigated. Analytical methods are proposed for the determination of the three dyes in mixtures without any prior separation step, by the application of the derivative technique to the normal absorption spectra, based on the use of cetyltrimethylammonium bromide (CTAB) in 0.1 M NaOH, over the concentration range 2-50 mug ml(-1). The methods are applied for determining the three dyes in commercial food products.
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