Analysis of Iodine Level (KIO3) based on the Formation of Amylum-Iodine Complex using UV-Vis Spectroscopy

Abstract

Iodine is an important component that needed by the body in the synthesis of thyroid hormones in order to maximize humans’ growth and development. Besides, iodine also plays a role in the regulation and metabolism system in the human body. Iodine Deficiency Disorders (IDD) is one of the nutritional problems which is an inhibiting factor in the development of human resources because it can cause disruption of mental development and human intelligence. Iodine in food is found from table salt, it found in the form of KIO₃ with a standard level of iodine in table salt that is 30ppm-80ppm. This research aims to determine the iodine levels in the four kinds of table salt using spectrophotometric methods based on the formation of the starch iodine complex. The formation of the starch iodine complex performed by reacting I- with the oxidizer IO₃^- in an acidic atmosphere with starch indicator. The resulting blue color was analysed by visible spectrophotometry and produce absorbance data. The measured iodine content is equal to samples A, B, C, and D showing results less than 30 ppm so it can be concluded that iodine in table salt still does not meet the SNI standards that should be around 30ppm-80ppm