BACKGROUND: Globally Iodine deficiency disorders (IDDs) is one of the important public health problem.Iodine
deficiency disorders leads to various diseases including cretinism,goitre,hypothyroidism,mental retardation,loss of
hearing,intellectual disabilities,abortion ,still birth .Iodine deficiency is the one of the preventable public health problems.
Due to the implement of IDD control programme in India ,94% of people taking iodised salt.IDD Monitoring Laboratories
in States are useful in measuring amount of iodine in production and consumer level.
OBJECTIVE : To test the availability of iodine in edible salt at households and retailers both in rural and urban areas from Jan
2017- June 2022 by iodometric titration method.
METHODS : Iodine Content of edible salt sample was estimated by a process called Iodometric Titration which involve the
titration of iodine liberated by addition of sulphuric acid (H2So4) from a solution of iodated salt. Iodine liberated is then
titrated with Sodium Thiosulphate.
RESULTS : A total of 31805 edible salt samples were tested at State IDD Monitoring laboratory from Jan 2017 to June 2022
and overall, 75% of the salt samples tested were found to have >15PPM iodine. There has been a consistent increase in
iodine adequacy from 66% in 2017 to 83% in 2022.
CONCLUSION : NFHS 2019-21 survey conducted among the households in which salt was tested, 92% in Tamil Nadu had
iodized salt against the national average of 94% suggesting the importance of State IDD Monitoring Laboratory to provide
scientific evidence to ensure availability of iodized salt in the community.