1, starch test solution, is an aqueous solution of starch. Usually have to be heated to dissolve into a clear and transparent solution;

2, starch test solution, can be used as an indicator of the end point of iodometric titration. Because it is easy to adsorb iodine called "iodine starch", turn blue. , When the iodine is quantitatively reduced, the blue color fades, that is, the end point is reached.