title: Determination of eight synthetic food colorants in drinks by high-performance ion chromatography.
abstract: Eight synthetic food colorants (Amaranth, Brilliant Blue, Indigo Carmine, New Red, Ponceau 4R, Sunset Yellow, Tartrazine, Allura Red) were determined by high-performance ion chromatography on an anion-exchange analytical column with very low hydrophobicity and visible absorbance detection. Gradient elution with hydrochloric acid-acetonitrile effected both the chromatographic separation of these colorants and the on-line clean-up of the analytical column, which was very advantageous for routine analysis. High-performance ion chromatography may be a solution to the chromatographic analysis for some water-soluble, organic analytes with strong hydrophobicity. The method has been applied to the determination of colorants in drinks and in instant drink powder. No time-consuming pretreatment, as used in conventional liquid chromatography, was needed.
authors.affiliation: Research Center for Eco-Environmental Sciences, Academia Sinica, Beijing, China.
authors.forename: Q C
authors.initials: QC
authors.lastname: Chen
authors.forename: S F
authors.initials: SF
authors.lastname: Mou
authors.forename: X P
authors.initials: XP
authors.lastname: Hou
authors.forename: J M
authors.initials: JM
authors.lastname: Riviello
authors.forename: Z M
authors.initials: ZM
authors.lastname: Ni
mesh_terms: D016477:Artifacts; D001628:Beverages / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D005505:Food Coloring Agents / Q000032:analysis*; D007477:Ions; D013057:Spectrum Analysis
chemical_list: D005505:Food Coloring Agents; D007477:Ions