Chemical Analysis and Instrumental Methods
Artificial colours can be separated using paper chromatography.
.Extract the colour from by placing it in a few drops of solvent.
.Put spots of the coloured solution on filter paer with a pencil baseline
.Roll up the paper and put it in a beaker with solvent (keep the baseline above the solvent)
.The solvent seeps up the paper taking the dyes with it, different dyes form spots in different places
.A chromatogram with four spots could be at least four dyes not exactly four dyes
You can identify different elements and compounds using machines. Advantages of this…