Vitamin C Research Paper

Daniel Garcia
Period 6
October 9, 2012
Research Paper Rough Draft

Weil, Andrew. "Supplements & Herbs." Facts on Vitamin C. N.p., n.d. Web. 08 Oct. 2012. <>.
Goodner, Kevin L. "Vitamin C and Citrus Juices." Vitamin C and Citrus Juices. USDA Citrus and Subtropical Products Research Laboratory, 1 Feb. 2006. Web. 08 Oct. 2012. <>.
"Which Fruit Juice Contains the Greatest Amount of Vitamin C?" N.p., n.d. Web. 08 Oct. 2012. <>.

Does the level of Vitamin C change overtime in Orange Juice?

Procedure to test for vitamin C content. (With this method, you can compare relative vitamin C content and rank foods from highest to lowest, but you won't be able to get exact concentrations.)
You'll need some 2% iodine solution (find it at your local pharmacy) to prepare the vitamin C indicator solution described in steps 1 to 4.
1. Mix 1 tablespoon of cornstach into enough water to make paste.
2. To this paste, add 250 milliliters of water and boil for 5 minutes.
3. Add 10 drops of the starch solution to 75 milliliters of water (use an eyedropper).
4. Add enough iodine to produce a dark purple-blue color. Now your indicator solution is ready.
5. Put 5 milliliters of indicator solution (about 1 teaspoon) in a 15-milliliter test tube (one for each sample).
6. To the test tube, use a clean eyedropper to add 10 drops of juice from the fruit or beverage (for solids, pulp them in a blender and strain the juice). Re-clean the eyedropper for each sample.
7. Hold the test tube against a white background. Line up the tubes from lightest to darkest purple. The lighter the solution, the higher the vitamin C content. That's because vitamin C causes the purple indicator solution to lose its color