ABSTRACT
Starch is a glucose polymer comprises of approximately 20" liner polymer amylose and 80" amylopectin polymers with many branches. In the iodine-starch reaction, amylose molecules in the starch form a helical structure in the aqueous solution and turn bluish purple-reddish brown when iodine molecules are present. Starch takes in iodine in a helical structure and emits color. Starch is used as an indicator in quantitative analysis. Iodine exists in various forms in the natural environment in the atmosphere, ocean, and soil, as well as in other environments such as in minerals, food, and chemical products, and plays a vital role in the respective environments. The iodine value is an indicator used to evaluate the properties of oils, fats, and biodiesel fuel. The iodine value is mainly used to compare the carbon-carbon double bond contained in complex mixtures of natural origin, such as animal and vegetable oils. Iodine is used in moisture measurements which are indispensable in factories and research institutions.
