Carbohydrates - Iodine/Potassium Iodide Test
Iodine/Potassium Iodide Test
Shows positive test for:
Iodine complexes with starch to form a blue-black product. Note that other polysaccharides may give other colors including blue or red.
How to perform the test:
Two ml of a sample solution is placed in a test tube. Two drops of iodine/potassium iodide solution and one ml of water are added.
A positive test is indicated by:
The formation of a blue-black complex.
a negative test (left) and a positive test (right)