Re: Iodine with vitamin C

Iodine together with Vitamin C? No.




The chemistry works like this: Iodine reacts with vitamin C. When this happens, both the Iodine and vitamin C turn into different chemicals. If a sample contains vitamin C, Iodine added to the sample will react with it and no longer be iodine. At the same time, the vitamin C that reacts with the iodine also is no longer vitamin C. When the amount of iodine added to the sample is greater than the amount of vitamin C that was there, all the vitamin C will be destroyed and there will be some iodine left over. So to find out how much vitamin C is in a sample, you can add small amounts of iodine, until the iodine you add no longer disappears as soon as it is added.
http://www.newton.dep.anl.gov/askasci/chem03/chem03023.htm



This method determines the vitamin C concentration in a solution by a redox titration using iodine. Vitamin C, more properly called ascorbic acid, is an essential antioxidant needed by the human body (see additional notes).

As the iodine is added during the titration, the ascorbic acid is oxidised to dehydroascorbic acid, while the iodine is reduced to Iodide ions.
http://www.outreach.canterbury.ac.nz/chemistry/vitamin_C_iodine.shtml

Tweet