Iodometic titration vs DCPIP titration

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  1. EstebanK0's Avatar
    1 17-07-2012  00:31
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    Iodometic titration vs DCPIP titration
    What are the advantages of using iodine and starch indicator over DCPIP when trying to determine the vitamin C concentration in a given solution?
  2. thegodofgod's Avatar
    2 17-07-2012  21:15
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    Re: Iodometic titration vs DCPIP titration
    (Original post by EstebanK0)
    What are the advantages of using iodine and starch indicator over DCPIP when trying to determine the vitamin C concentration in a given solution?
    The iodine/starch reaction is a redox reaction; the DCPIP reaction is an acid-base reaction. The redox reaction is better than an acid-base titration since there are additional acids in a juice, but few of them interfere with the oxidation of ascorbic acid by iodine. Hence, using iodine/starch instead of DCPIP will give you a more accurate vitamin C concentration.
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  3. EstebanK0's Avatar
    3 17-07-2012  22:41
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    Re: Iodometic titration vs DCPIP titration
    Great info!
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