Iodine–starch test

Iodine–starch test
Schematic view of I3− ions embedded in amylose helix
ClassificationColorimetric method
AnalytesStarch

The iodine–starch test is a chemical reaction that is used to test for the presence of starch or for iodine. The combination of starch and iodine is intensely blue-black.[1][2] The interaction between starch and the triiodide anion (I−
3) is the basis for iodometry.

  1. ^ Cite error: The named reference JCE was invoked but never defined (see the help page).
  2. ^ Naiman, Barnet (1937). "Preservation of starch indicator". Journal of Chemical Education. 14 (3): 138. Bibcode:1937JChEd..14..138N. doi:10.1021/ed014p138.1.
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