Test for Vitamin C in Foreign Oranges

Today we modified our test for Vitamin C in order to make the orange juice smooth enough to allow pipetting in the 25mL volumetric pipette.

The modifications done to this experiment include:

(i) We replaced the manual orange juicer with an electronic juicer

(ii) We passed the orange juice through a cheese cloth to remove large pieces of pulp.

The procedure followed is shown below:

1. We peeled 4 oranged and juiced them in the electronic juicer as shown below:

2. Then the juice was passed through a cheesecloth to remove large pieces of pulp.

3. Once the juice was strained through the cloth, 25mL of it was titrated against 0.005M iodine solution

As expected orange juice required a considerable amount of iodine solution to reach end-point since the amount of Vitamin C in oranges is high.

Tomorrow we will perform the Test for Vitamin c on Maltese oranges.