The best validation parameters among red dyes were obtained from allura red (E129) that showed a mean recovery of about 90% and repeatability and reproducibility parameters very
low. In general, RSD% values for dyes of group B were considerably lower than those resulting from group A. In some cases RSDr values were higher than RSDR parameters: probably the large number of replicates and the ruggedness of the method allowed these
apparently anomalous parameters. Rather