Amplification Titrimetric Determination of Iodine in Edible Salts Found in Local Markets in Ogun State, Nigeria

Abstract

The iodine value of randomly selected edible salts sold in local markets in Ogun State, Nigeria has been investigated using the classical amplification titrimetric method in which potassium iodide is used to amplify the concentration of iodine for effective quantitation and the results show clearly the disparity between the branded and unbranded samples. Five samples of each grade; branded and unbranded were analyzed by amplification method and results show that the iodine content of the branded edible salts range from 11.420 mg/100g to 13.96 mg/100g showing a deviation from RDA of 1.04 mg/100g to 3.58 mg/100g on the other hand, the unbranded edible salts showed iodine content in the range of 3.81 mg/100g to 7.62 mg/100g showing a deviation from RDA of 7.38 mg/100g to 11.19 mg/100g. This result clearly show the inadequacy of the locally processed edible salts and the need to fortify them with iodine to reduce the health risk associated with iodine deficiency in individuals residing in the rural areas where the access to iodized table salts may be low. The attendant health risk in consuming higher amounts of these edible salts in rural areas where access to iodized salts are often low so as to narrow the deviation from RDA may be fatal in individuals with high blood electrolyte and chronic hypertension