Before revision: Chemical tests Granules of wheat starch, stained with iodine, photographed through a light microscope A solution of triiodide (I3−) (formed by mixing iodine and potassium iodide ) can beused to test for starch.
After revision: Chemical tests Granules of wheat starch, stained with iodine, photographed through a light microscope A solution of tripotassium iodide (I3−) (formed by mixing iodine and iodide ) can beused to test for starch.