Separation and identification of food colours

Highly sensitive determination of Sunset Yellow in drink using a poly (l-cysteine) modified glassy carbon electrode

“…8 Hence, the testing of SY in foods, beverages, medicines, cosmetics and coloring is particularly important. Up to now, analytical methods such as: high performance liquid chromatography (HPLC), 9,10 HPLC-mass spectrometry (HPLC-MS), 11 spectrophotometry, [12][13][14] micelle mediated preconcentration method, 15 capillary electrophoresis, 16,17 ion-pair liquid chromatography, 18 thin layer chromatography, 19,20 anion-exchange chromatography, 21 enzyme-linked immunosorbent assay (ELISA) 9 and ratio derivative voltammetric 22 have been used for the determination of SY. To overcome the shortcomings of these methods, such as: complex sample pretreatment, expensive instrumentation and timeconsuming procedures, a convenient, quick, sensitive and accurate analytical method for SY is urgently sought.…”

A new method for analysis of sunset yellow in food samples based on cloud point extraction prior to spectrophotometric determination

“…bivariate calibration and derivative spectrophotometry [3,4], polarography and voltammetry [5][6][7][8], HPLC-MS [9], capillary electrophoresis [10], thin layer chromatography [11] and ion-pair liquid chromatography [12] have been reported for determination of food colorants. Some of these methods, e.g.…”

The Coloration of Food

“…More than 60 different colorants are on the permitted list of one country or another (see, e.g., ref. 14). Clearly, such a state of affairs is a real obstacle to international trade in foods.…”