Extraction and characterization of native starch obtained from the inhambu tuber

Starch is the main carbohydrate consumed by humans, obtained from many vegetable sources and known for its non-toxicity, applications and low cost. The aim of this work was the extraction and study of characteristics of non-conventional starch arising from inhambu (Dioscorea trifida L.). Chemical, physicochemical, thermal, morphological, structural and technological properties were evaluated. The starch yield percentage obtained from the extraction, starch and amylose contents of inhambu starch were considerably high, 22.76%, 84.56% and 36.82% respectively. Native starch presented high purity due the low ash, protein and fat content. The thermogravimetric analysis shown 69% weight loss in a 293.12-476.59 °C temperature range and the endothermic peak was at 100.0 °C. The starch granule morphology shown spherical shapes and smooth surfaces and size ranging from 5.06 to 14.59 µm. Considering the unique starch characteristics, its application in different industrial sectors can be foreseen.