1Y. Yildiz*, 2M. A. Alfeen, B. Yildiz3
1Science Department, John F. Kennedy Educational Complex, ACT-Academy AP Chemistry Teacher, New Jersey, USA.
2Department of chemistry, Faculty of Second Science PhD, Al-Baath University, Homs, Syria.
3Department of Biomedical Sciences, Rutgers University, Newark, NJ, USA
A B S T R A C T
The Iodine value (IV) also called “Iodine number or Iodine absorption value” is an important analytical characteristic of unsaturation of fats and oils. It is expressed as the “ number of grams of iodine that will react with the double bonds in 100 grams of fats, oils, and waxes.” Saturated oils, fats, and waxes take up no iodine; therefore their iodine value is zero; but unsaturated oils, fats, and waxes take up iodine. Unsaturated compounds contain molecules with double (-C=C-) or triple (-C≡C-) bonds, which are very reactive toward iodine. The more iodine is attached, the higher is the iodine value, and more reactive, less stable. In performing the test, a known excess of iodine, usually in the form of iodine monochloride (ICl), is allowed to react with a known weight of the oil, fat or wax, and then the amount of iodine remaining unreacted is determined by titration using of sodium thiosulfate volumetric standard solution.
Keywords: Iodine Value, Hanus method, Triisocetyl Citrate, Citmol-316