Lake Dyes (Lakes) - These are a form of the certifiable colors that are water-insoluble. These forms are more stable than the straight dyes and are ideal for products where the makers do not want the color to bleed. Such products are hard candies and coated tablets.
Straight Dyes - These are a form of the certifiable
colors that dissolve in water. They are manufactured as powders, granules,
liquids or other forms. This form is used in baked goods and beverages.
F.D.&C .- Labels placed in front of colors allowed
to be used in food, drug and cosmetic products.
Solvent - As used in chromatography, it is the solution
placed at the bottom of the container and it touches the paper or thin-layer
cell. This moves up the paper or cell by capillary action.
Solute - This is the color, dye, or whatever you put onto the chromatography paper or thin-layer cell to be tested. This will be affected by the solvent as the solvent front touches it. Th solute will be carried along with the solvent until it stops.
Stationary Phase - This is what the mobile phase moves on. In paper chromatography it is the paper. This phase does not move, therefore it stays stationary.
Mobile Phase - This is the phase that moves along the
stationary phase. It is the solvent in paper chromatography and thin-layer
chromatography.
F.D.A. - Food and Drug Administration. This is a government
run administration which decides whether certain foods and food additives are
safe for consumption or use. This administration is the one that puts the F.D.&C.
label on food dyes if they think that the dyes are safe.
Project researched and
documented by Ann VanBlaricum
Disclaimer: These pages were written in 1997 while the author was a sophomore in high school taking AP Chemistry. Hence, the author is not an expert on this subject, she cannot vouch for the accuracy or currency of these data or the links.