An interactive tutorial to determine the amount of dyes present in a powdered beverage in order to examine the allegation that the manufacturer is exceeding the allowable amount of the artificial food dyes in the drinks it produces.he drink may contain more than one dye, and so the dyes must first be separated by column chromatography and then identified by colorimetric analysis. This is a qualitative analysis of the dyes.Once the dyes have been identified we can determine their concentration in the prepared drink using Beer's Law, another colorimetric technique. This is a quantitative analysis of the dyes.