title: Simultaneous determination of the colorants sunset yellow FCF and quinoline yellow by solid-phase spectrophotometry using partial least squares multivariate calibration.
abstract: A method for the simultaneous determination of the colorants Sunset Yellow FCF and Quinoline Yellow using solid-phase spectrophotometry is proposed. The colorants were isolated in Sephadex DEAE A-25 gel at pH 5.0, the gel-colorants system was packed in a 1 mm silica cell and spectra were recorded between 400 and 600 nm against a blank. Statistical results were obtained by partial least squares (PLS) multivariate calibration. The optimized matrix by using the PLS-2 method enables the determination of the colorants in artificial mixtures and commercial soft drinks.
authors.affiliation: Department of Analytical Chemistry, University of Granada, Spain.
authors.forename: L F
authors.initials: LF
authors.lastname: Capitán-Vallvey
authors.forename: M D
authors.initials: MD
authors.lastname: Fernández
authors.forename: I
authors.initials: I
authors.lastname: de Orbe
authors.forename: J L
authors.initials: JL
authors.lastname: Vilchez
authors.forename: R
authors.initials: R
authors.lastname: Avidad
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D002253:Carbonated Beverages / Q000032:analysis; D002850:Chromatography, Gel; D004396:Coloring Agents / Q000032:analysis*; D005505:Food Coloring Agents / Q000032:analysis*; D011804:Quinolines / Q000032:analysis*; D013053:Spectrophotometry
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D005505:Food Coloring Agents; D011804:Quinolines; C019303:quinoline yellow; C005842:6-hydroxy-5-((p- sulfophenyl)azo)-2-naphthalenesulfonic acid disodium salt