IS5166 Starch Agar
Used to determine if bacteria produce extracellular enzymes to catalyze the hydrolysis of starch. Starch agar is inoculated and incubated at 37⁰C. After 48 hours the surface of the agar is flooded with potassium/potassium iodide solution. Organisms that produce a starch hydrolyzing enzyme will display a clear zone around the area of growth while other areas of the agar containing starch will turn blue-black.
100 g Starch Agar
Use 25 grams with 1 liter of water.