I picked three oranges on three different days. I kept them in a cool refrigerated place. I made a Vitamin C solution, an iodine solution, and a starch solution to test how mugh Vitamin C is in oranges the longer they stay in the tree. I squeezed the juice from each orange and tested it by using a titration method.
The orange that was picked on December 19 had the most Vitamin C. It took six drops to titrate it. The orange picked on January 6 took seven drops to titrate it. The orange picked on January 12 had the least Vitamin C. It took ten drops to titrate it. It was almost two to one.
The orange picked on December 19, 2003 had the most Vitamin C. The reason I think it had the most Vitamin C is because Vitamin C is a water soluble vitamin and the oranges picked on January 6 and 12 were so much bigger with more juices. They were also sweeter.
This project was about finding out if oranges lose or gain Vitamin C after being picked.
Science Fair Project done By Nicholas J. Hickernell