Qc. Chen et al., Determination of eight synthetic food colorants in drinks by high-performance ion chromatography, J CHROMAT A, 827(1), 1998, pp. 73-81
Eight synthetic food colorants (Amaranth, Brilliant Blue, Indigo Carmine, N
ew Red, Ponceau 4R, Sunset Yellow, Tartrazine, Allura Red) were determined
by high-performance ion chromatography on an anion-exchange analytical colu
mn with very low hydrophobicity and visible absorbance detection. Gradient
elution with hydrochloric acid-acetonitrile effected both the chromatograph
ic 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 s
ome 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 liqu
id chromatography, was needed. (C) 1998 Elsevier Science B.V. All rights re
served.