The resulting iodine was titrated using standard sodium thiosulfate, in the presence of starch as indicator. The values of unused ozone were determined, according to the procedure given by our previous studies [7e9].
The resulting iodine was titrated using standard sodium thiosulfate,in the presence of starch as indicator. The values of unusedozone were determined, according to the procedure given by ourprevious studies [7e9].