Morphological analysis of chemically umbut palm stem starch granules using scanning electron microscope

Abstract

The purpose of this research was to determine the morphological structure of modified umbut palm stem starch. The method used was an experimental method with a Completely Randomized Design (CRD). The treatments in this study were A (modified with 1% CH3COOH), B (modified with 2% HCl), and C (modified with 4% H2SO4). The result of this research is the morphological structure of umbut palm stem starch undergoes changes in granular structure after hydrolysis with various acids. Particle size of the sample with 100x magnification in each treatment are treatment A 177.76µm, treatment B 130.86 µm and treatment C 85.25 µm. Based on the results of morphological analysis of modified umbut palm stem starch using several acid treatments that starch granules in treatment B have more changes in granule shape, as can be seen from the destruction of irregular starch shapes and the presence of many flakes has a shape like a split stone and a rather smooth surface. Implications of the results of the research are known that the umbut palm stem starch that has been modified using different acid treatment is seen morphologically undergoing changes in structure or shape.