MadSci Network: Chemistry |
Dear Zulaika,
In order to detect significant losses of iodine from solutions of iodised salt at different temperature you would have to go above 350oC.
Indian researchers (A. Bhatnagar , N. S. Maharda , V. K. Ambardar , D. N. Dham, M.
Magdum and R. Sankar. (1997) Iodine
loss from iodised salt on heating. Indian Journal of Pediatrics, 64(6): 883-885.) found out
the following:
"... data regarding iodine loss due to high temperatures of cooking
procedure is scarce. Using iodometric titration methods, we calculated
iodine content of iodised salt samples subjected to incremental heat up to
350 degree Celsius. The results of the study indicate a gradual but
minimal loss of iodine content from the iodised salt samples when
subjected to high temperature with a maximum loss noticed being 18.5% at
350 degree Celsius. We conclude that there is minimal loss of iodine from
the salt fortified with potassium iodate when subjected to heating..."
Hope this helps.
Luis
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