aqueous *fuchsin solution decolourized with sulphur dioxide. A blue coloration develops in the presence of aldehydes. [H. Schiff (1834–1915), German chemist]
(PAS reaction) a test for the presence of glycoproteins, polysaccharides, certain mucopolysaccharides, glycolipids, and certain fatty acids in tissue sections. The tissue is treated with periodic acid, followed by *Schiff’s reagent. A positive reaction is the development of a red or magenta coloration.... periodic acid–schiff reaction
Health Encyclopedia