Description
Recommended by Codex as type I method IUPAC-AOCS-AOAC-NMKL method. This method is applicable to the determination of iodine values for fats and oils that do not contain conjugated double bonds.Fat or oil is mixed with iodine monochloride solution to halogenate double bonds. The excess of iodine monochloride is reduced to free iodine in the presence of potassium iodide. The free iodine is measured by titration with sodium thiosulphate.