I am thinking about doing a science fair experiment but I need to find a way to measure Vitamin C?

I am doing an experiment on whether the amount of Vitamin C in a variety of drinks differ over time. However, I need to find a way in which I can measure the amount of vitamic C. How can I measure Vitamin C?

I am thinking about doing a science fair experiment but I need to find a way to measure Vitamin C?
Sounds like a good experiment, Good Luck. The URL below gives the name of a place where you can buy a Vitamin C test kit. Every chemical supply houses have them, just tell them what you are doing and they will send you the exact kit you need.
Reply:There are premade kits for testing for Vit C, aka ascorbic acid





http://www.hach.com/hc/browse.parameter....


http://www.hannainst.co.uk/acatalog/HI_3...