1. Testing Iodine Content of Salt: Kit and Home Based Methods
Ms Cadi Parveen Banu
Institute of Nutrition and Food Science,
University of Dhaka

2. Salt Iodization Program in Bangladesh
Background
During the period , the first National Nutrition Survey was carried out in Bangladesh ( the then East Pakistan) identified prevalence of hyper endemic goiter .
The second nutrition survey was organized in rural areas of Bangladesh in Both the survey reported that average prevalence of goiter was found to be 28.9% and 13.8% in and respectively

3. The first National Goiter Prevalence study of Bangladesh was conducted in 1981 by the Institute of Public Health Nutrition (IPHN).
During survey, only goiter was assessed; no data on cretinism or other consequences were collected.
The survey revealed, a wide prevalence of goiter to varying degree all over the country with an average national prevalence rate of 10.51% and some areas of high endemicity of goiter (e.g. Jamalpur, Rangpur).

4. Law for Universal Salt Iodization
In 1989 Government of Bangladesh passed a law making it mandatory the universal iodization of all edible salt.

5. IDD Situation of Bangladesh According to National Survey,1993
0.5%
Cretinism
47.1% Total Goiter Rate (TGR)
68.9% Biochemical Iodine deficiency

6. A by-law was passed in 1994 only then substantial improvement was made in the infrastructure of universal salt iodization (USI).

7. Universal Salt iodization
For the assessment of iodine content of salt USI survey was conducted in 1996 and 1999
During the period of , the percentage of adequately iodized salt at HH level (≥15 ppm) was maintained at 54 to 55%.
At the factory level 4.8% salt had adequate iodine (45-50 ppm).

8. IDD Situation of Bangladesh According to National Survey,1999
0.4%
Cretinism
17.8% Total Goiter Rate (TGR)
43.1% Biochemical Iodine Deficiency

9. IDD SURVEY,2004-5
The overall prevalence of iodine deficiency was 33.8% and 38.6% among the children and women respectively.
High Prevalence of IDD among the children and women was observed in some selective areas.

10. Methods for Testing Iodine in Salt
Qualitative
Home based
Testing Kit
Quantitative
Titration

11. Principle
Iodine is added in the form of KIO3 to iodize the salt in Bangladesh.
Iodine can be set free from KIO3 in iodized salt by addition of acid.
The liberated iodine forms violet color complex with starch.

12. Home based method: testing iodine
Take one tea spoon of household salt
Mix with 5 grains of cooked rice
Then add a few drops of lemon juice
Salt will turn purple if it contains iodine
There will be no color change if it does not

13. Testing Kit: Developed by IFST, BCSIR
A leveled spoonful of salt is taken in a marked transparent plastic container
A small amount of working solution (bottle 2) is added to the salt in the container
The container is swirled till the salt dissolves
Then more working solution will be added to bring the volume up to the mark of the container and mix thoroughly.

14. About 10-15 ml of salt solution will be taken in a cup.
A piece of paper strip will be dipped in the salt solution.
Allow to develop the violet color (7-10 sec)
Comparing the developed color with the supplied colored chart.
Read out the amount of iodine in salt.

15. Thank
You