Utility of spot testing kit in the quantitative estimation of iodine content in salt.

The iodine content of iodized salt is routinely assessed in the laboratory by the standard 'iodometric titration' method(l). Recently, a simpler method has been developed which is popularly known as the 'spot test for iodine estimation'. In these test, estimation of iodine content in salt is done with the help of a kit. The most commonly used kit provided by the Government of India for 'on the spot' estimation of iodine is manufactured by a Madras based company. The kit consists of two plastic bottles, one containing test solution (A) and other with recheck solution (B). A paper strip with 4 color zones is pasted on the container of the bottles. The first zone is white in color and it indicates absence of iodine: the second,