Potassium iodate

About: Potassium iodate is a research topic. Over the lifetime, 611 publications have been published within this topic receiving 5940 citations. The topic is also known as: KIO3.

Effects of potassium iodate and iodide on thyroid capability of antioxidation in iodine deficiency rats

Abstract: Objective To study the effects of potassium iodate and iodide on thyroid conformation and its function of iodine deficiency rats.Methods 120 iodine deficiency rats were divided randomly into four groups:normal potassium iodide group (NI) , normal potassium iodate group (NO) ,high potassium iodide group (HI) ,higli potassium iodate group (HO) .Using biochemical method to determine the weight of thyroid, changes of iodine metabolism, the level of serum T3, T4, morphology and capability of thyroid antioxidation at 22 weeks. Results In HO and HI Wistar rats, the urinary iodine excretion were as 100 times high as that in NI group.The thyroid weight and the ratio of thyroid weight to body weight of HO group increased significantly( P 0.05) ,only the ratio of thyroid weight to body weight of HI group increased significantly( P 0.05) .The serum T3 in HO and HI groups increased significantly( P 0.05)compared with NI group. NO, HO, HI groups compared with NI group, the activity of GPX, SOD, TAOC was decreased significantly( P 0.01) , the MDA in HO group was increased significantly, but in NO, HI group did not change. HO group compared with HI group, the activity of GPX,TAOC was decreased significantly( P 0.05) .Conclusion High dose potassium iodate and iodide caused the regression of iodine deficiency rat goiter slowly; potassium iodate induced antioxidant enzymes decreased compared with iodide in normal or high dose, only high dose potassium iodate lead MDA of thyroid to increase.

Cerium/Ascorbic Acid/Iodine Active Species for Redox Flow Energy Storage Battery.

Abstract: In this study, we developed a novel cerium/ascorbic acid/iodine active species to design a redox flow battery (RFB), in which the cerium nitrate hexahydrate [Ce(NO3)3·6H2O] was used as a positive Ce3+/Ce4+ ion pair, and the potassium iodate (KIO3) containing ascorbic acid was used as a negative I2/I− ion pair. In order to improve the electrochemical activity and to avoid cross-contamination of the redox pair ions, the electroless plating and sol–gel method were applied to modify the carbon paper electrode and the Nafion 117 membrane. The electrocatalytic and electrochemical properties of the composite electrode using methanesulfonic acid as a supporting electrolyte were assessed using the cyclic voltammetry (CV) test. The results showed that the Ce (III)/Ce (IV) active species presented a symmetric oxidation/reduction current ratio (1.09) on the C–TiO2–PdO composite electrode. Adding a constant amount of ascorbic acid to the iodine solution led to a good reversible oxidation/reduction reaction. Therefore, a novel Ce/ascorbic acid/I RFB was developed with C–TiO2–PdO composite electrodes and modified Nafion 117–SiO2–SO3H membrane using the staggered-type flow channel, of which the energy efficiency (EE%) can reach about 72%. The Ce/ascorbic acid/I active species can greatly reduce the electrolyte cost compared to the all-vanadium redox flow battery system, and it therefore has greater development potential.

Iodisation of Lake Katwe Salt, Kasese District

Abstract: The raw rock salt was analysed for its chemical composition in terms of selected chemical species. It exhib- ited a large quantity of chemical impurities with sulphate at 20.7% w/w, carbonate 31.7 %, magnesium 945 ppm, iron 168 ppm, calcium 74 ppm and zinc at 18 ppm with chloride anion at 1.54% w/w. Titrimetry was used for determination of chloride and carbonates, sulphate was determined gravimetrically. ASS was used for determination of cations. Several methods were used for purification of the raw salt namely; fractional crystallization, precipitation with barium chloride, sodium state, potassium permanganate and ammonium sulphide. The purified salt had the following composition; carbonate 1.42% w/w, sulphate 3.83% chloride 50% w/w, iron 7.4±0.25, magnesium 7.64±0.20, calcium 4.40±0.30 and zinc 4.22±0.15. The refined salt was iodised at 100ppm by addition of (0.0356g) potassium iodate to 200 g salt. The level of the added iodine was determined by iodometric titration. It was found constant for two weeks (the experimental period).