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Rf Values of Artificial Food Colors by 在于在 is a document available to read on EtoBox.

Chromatographic separation was performed on the artificial food colors in Skittles candies. The experiment measured the distance traveled by each color spot and calculated the Rf value for red, green, yellow, orange, and violet. Green had the highest Rf value of 0.3372, indicating it traveled farthest relative to the solvent front, while red had the lowest Rf of 0.1279, meaning it did not migrate as far as the other colors during chromatography.

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