I am going to prepare Lugol's iodine or Lugol solution. It is a solution of iodine and potassium iodide in water. It has many uses like disinfectant and as a reactive for the iodine test in order to detect the presence of starch in a sample.
Starch is a polysaccharide, it is a polymer in which the repeating units are sugars. It has a spiral structure. The iodine ions get into the wholes at the starch spiral changing its properties of light absortion, so it turns dark purple.
en.wikipedia.org/wiki/Lugol's...
en.wikipedia.org/wiki/Iodine_...
en.wikipedia.org/wiki/Starch
en.wikipedia.org/wiki/Iodine
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Негізгі бет Lugol. Iodine Test. Starch Detection
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