Analysis Iodine Concentration on Salt with Spektrofotometri Method

Abstract

Spektrofotometer is one of the instrumental analysis method that uses the basic interaction of energy and matter. Spectrophotometry can be used to determine the concentration of a solution through the absorption intensity at certain wavelengths. The wavelength used is the maximum wavelength which gives maximum absorbance. One spectrophotometer working principle is based on the phenomenon of absorption of light by certain chemical species in the ultraviolet and visible light (visible). Iodine is one type of micro minerals that play an important role in the body's physiological systems. Iodine in the body in very small quantities, as many as approximately 0.00004% of body weight or about 15-23 mg. Iodine is found in 1811 by Courtois. Iodine is a monovalent anion. The situation in mammals and the human body as a thyroid hormone. These hormones are very important during embryo formation and to regulate the metabolic rate and caloric or energy production. In this lab analyzed, contained levels of iodine in salt, the salt krosok, salt boxes and salt powder, using a standard solution of 0.1 N Iodide Absorbance measurements performed at a wavelength of 595 nm. The results of lab analysis of iodine levels in salt with a spectrophotometric method showed that the highest content of iodine in powder salt is 97.9 mg/100g and krosok salt and box salt is 66.67 mg/100g and 62.5 mg/100g. Key Word : Analysis iodine, Spektrofotometri, analysis salt