DCPIP: vitamine C

• DCPIP is a redox indicator dye.

  • It turns from blue to colorless when reduced (accepts electrons).
  • Vitamin C, an antioxidant, decolorizes DCPIP.
  • This reaction measures the Vitamin C content in fruit juice.
• Method:

  1. Transfer 1cm of DCPIP solution into a test tube with a pipette.
  2. Add Vitamin C solution dropwise to the DCPIP solution. Shake after each drop.
  3. Record the volume of Vitamin C that is required to change the colour of the DCPIP.
  4. Repeat experiment + replace the Vitamin C solution with the fruit juices.