Simultaneous Determination of Synthetic Food Dyes E102 and E110

The method of derivative spectrophotometry with measurements at zero-crossing wavelenghts is proposed for simultaneous quantitative determination of synthetic food dyes Tartrazine (E102) and «Sunset yellow» (E110). The method was tested on model mixtures and applied to determine the content of dyes in carbonated soft drinks. The error does not exceed 7%.