Iodine losses in iodised salt following different storage methods

Abstract

Iodine retention in three types of iodised salt viz., powdered salt, white crystal and brown crystal salt was estimated at an interval of 15 days following commonly practised storage methods i.e., glass jar with lid, plastic jar with lid, earthernware pot with lid, cut open salt packet and salt pack as it is. Highest percent retention of iodine irrespective of type of salt was noticed in intact salt packet (97.19%). The iodine retention was above 80% in other methods--88.41% retention in cut open salt packet, 84.72% in glass jar, 82.86% in earthern pot and 80.85% in plastic jar. Powdered salt had maximum iodine retention (91.16%) followed by brown crystal salt (84.24%) and white crystal salt (76.71%). Even though the iodine content was found to decrease during storage, the powdered salt and brown crystal salt had iodine in the recommended level. On the contrary, white crystal salt contained only half (7 ppm) that recommended at the retail level (15 ppm).

Prevalence and determinants of anaemia and effect of different interventions amongst tea tribe adolescent girls living in Dibrugarh district of Assam

“…Goitre was found in 1.87% which indicates presence of iodine deficiency disorder and it was observed that some of them are still not using iodized salt and the salt preservation technique to prevent iodine evaporation was also found defective in few households. 20 Nutritional anaemia is one of the major public health problems in India affecting almost 70% of children and 56% amongst ever married women. 21 There is convincing evidence that iron deficiency and anaemia causes impaired growth, developmental delay, decreased physical activity, behavioural abnormalities and impairs cognitive function (poorer attention span, memory, concentration and concept acquisition) leading to poor school performance.…”

Effect of storage conditions on potassium iodide stability in iodised table salt and collagen preparations

“…Storage in open containers or in containers made from materials allowing the flow of air also has an adverse effect on the stability of KI in iodised table salt (Diosady et al. , 1997; Jaykashree & Naik, 2000).…”

“…It was observed that the storage of iodised table salt in high-humidity conditions (relative humidity of about 100%) increased iodine losses in comparison with the losses recorded in medium-humidity conditions (relative humidity of 60%) (Diosady et al, 1998;Szymandera-Buszka & Waszkowiak, 2004). Storage in open containers or in containers made from materials allowing the flow of air also has an adverse effect on the stability of KI in iodised table salt (Diosady et al, 1997;Jaykashree & Naik, 2000). A significant effect of both humidity and air access on the retention of iodine in iodised table salt is related to the fact that KI is unstable and may easily be oxidised to elementary iodine by oxygen or oxidising agents, especially in the presence of water (Mannar & Dunn, 1995).…”

Prevalence of Goitre and Iodine Intake in Kanpur

“…is divided by recommended amount of iodine (15ppm), provide 150g of iodine per day, which is sufficient for normal physical and mental development. [8].…”