Determination of natural and synthetic colors in alcoholic and non-alcoholic beverages by quantitative HPTLC

Methods based on high performance thin layer chromatography with scanning densitometry and solid phase extraction were developed for quantification of lycopene and permitted synthetic food dyes in alcoholic and nonalcoholic beverages. Results of analyses of real samples are reported, and the methods were validated by determining the precision of replicate analyses and accuracy (recovery) by analyzing spiked samples.