Add silver ammonia solution (or newly prepared copper hydroxide) to the solution and produce a silver mirror (or brick red precipitate), indicating that glucose was produced by hydrolysis.

After starch enters the human body, part of the starch is catalyzed by the amylase contained in saliva, and undergoes a hydrolysis reaction to generate maltose; the remaining starch continues to process under the action of amylase secreted by the pancreas in the small intestine. Hydrolyze to produce maltose.

Under the catalysis of maltase in the intestinal juice, maltose is hydrolyzed into glucose that can be absorbed by the human body to supply the nutritional needs of human tissues.

Extended information:

Starch can be hydrolyzed under the catalysis of acid; the hydrolysis process of starch: dextrin with a smaller molecular weight is generated (the product of incomplete hydrolysis of starch) , dextrin continues to be hydrolyzed to form maltose, and the final hydrolysis product is glucose.

The intermediate product dextrin of starch hydrolysis (there are red dextrin with larger molecular weight and white dextrin with smaller molecular weight), the color change when reacting with iodine is: purple-brown-yellow, if starch is hydrolyzed If it is not thorough, different colors will appear.