This method describes how to determine the ozone content of water using iodometric titration.
Water intended for use as an ingredient in the production of beer (brewing liquor) or other foods
Ozone is primarily used for the disinfection of drinking water. In order to do so, a precise value for the ozone concentration in the water is required.
Ozone oxidizes iodide to iodine, which forms a clathrate compound that exhibits a blue color and which loses its color through titration with a sodium thiosulfate solution. The ozone concentration is determined on the basis of the quantity of sodium thiosulfate solution consumed in the reaction.