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Testing Iodine Content of Salt: Kit and Home Based Methods

Testing Iodine Content of Salt: Kit and Home Based Methods. Ms Cadi Parveen Banu Institute of Nutrition and Food Science, University of Dhaka. Salt Iodization Program in Bangladesh. Background

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Testing Iodine Content of Salt: Kit and Home Based Methods

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

  2. Salt Iodization Program in Bangladesh Background • During the period 1962-1964, 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 1975-76.Both the survey reported that average prevalence of goiter was found to be 28.9% and 13.8% in 1962-64 and 1975-76 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

  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 1996-99, 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

  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

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