Determination of potassium iodide in table salt
2009
Rajkovic, M.B., Faculty of Agriculture, Belgrade - Zemun (Serbia)
The samples of table salt brought in Belgrade supermarkets are analyzed. The method of indirect iodometry was used in the process of analysis, and received results were converted into the content of KI in mg/kg of salt. Beside the content of KI, the content of NaCl was also determined, counted to dry matter and water content, and received results were compared to requests determined by Regulations of Table Salt Quality Meant for Human Diet and by manufacturer declaration. All received results show that the samples of table salt which can be brought in supermarkets are according to the demands given by Regulations. Only one sample (evaporated salt) has significantly less mass of KI than it is determined by Regulations, but also by manufacturer declaration. Measured humidity in the samples of table salt received from sea salt (sample 1) is higher than humidity in the samples received from rock salt as the result of magnesium presence in sea salt, which is hygroscopic material. Although samples 5 and 6 also originate from sea salt, their smaller humidity is the result of additional heating and salt processing.
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