Vitamin C Testing

Overview

Objectives/Goals My objective was to determine which beverage contains the most Vitamin C. I believe that orange juice will have the highest level of Vitamin C, while Sprite will have the lowest. Methods/Materials Eight different beverages were purchased; freshly squeezed orange juice, Sunny Delight, lemonade, lemon juice, Sprite, Gatorade, Kool-Aid and apple juice. A starch solution consisting of one part baking soda and five parts water was added to each drink to neutralize the acid. Using a pipette, iodine was then dropped into each beverage until the color changed from its original. The beverage that took the most iodine to change the color has the most Vitamin C. Results The orange juice consistently tested highest for the level of Vitamin C of all eight beverages, while Sprite and apple juice tested the lowest. Conclusions/Discussion My conclusion is that the orange juice has the highest level of Vitamin C, and Sprite and apple juice has the lowest. These results supported my hypothesis. Surprisingly, other beverages also contain high levels of Vitamin C.

Competition history

• CSEF 2002 Chemistry · Entry J0519

Resources

• CSEF project summary ↗

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