Paper chromatography is a logical technique used to separate works of a solution. Three examples of how we apply this technique to real-life would be: contaneminants in water, separation of plant pigmentation, and analysis of narcotics. Source: http://www.discoveriesinmedicine.com/Bar-Cod/Chromatography.html#b
Purpose: To find out why candies are different colors.
* Materials: Candy with a colored coating, like Skittles® or M&Ms® (4 different colors) * Rubbing alcohol or isopropyl alcohol
* Coffee filters (2)
* Tall glasses or plastic cups (2)
* Foil or paper plate
* Table salt
* Toothpicks or cotton swabs (4)
* Measuring cups/spoons
* Clean pitcher or 2-liter bottle
Procedure: 1. Cut coffee filter in a square (3cm) (2 strips). 2. Space four drops of water on a piece of foil. Put one candy of each color on the drops. Let it sit for a minute. Throw away candy. 3. Use a pencil (not a pen) to draw a line one cm (1/2 inch)from the edge of one end of the one strip of paper. 4. Make four pencil dots (one of each color used) on the given line about 0.5 (1/4 inch) apart. Label the color of the candy you test on. (Use abrreviations.) Make prediction.
5. Dip toothpick into a sample colored water, dab the color onto the pencil. Repeat using another toothpick for the following colors. Allow filter paper to dry, go back and add MORE color to the following dots. 6. Mix 1/8 teaspoon of salt and three cups of water in a pitcher/2 – liter bottle. Stir solution. Result: 1% salt solution. 7. Pour the salt solution in a tall glass (clean). The liquid level will be: ¼ inch. 8. Tape strip to a pencil. Put pencil on top of jar. Let the strip hang in the jar. Colored spots should not come in contact with the liquid in the bottom of the glass. 9. Tube action will draw the salt solution on a paper. As it passes the dots, it will separate the dyes....
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