Isolation and characterization of starch from purple yam ().

Unlabelled: As a starchy raw material, purple yam presents pigments and mucilaginous material, what can difficult the extraction of pure starch. The extracted starches of by aqueous and alkaline ways were investigated for purity, thermal, physicochemical, technological and functional properties. The starch obtained by alkaline extraction presented higher water absorption capacity and pasting temperature when compared to that obtained by the aqueous extraction method.