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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.


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Journal ArticleDOI
TL;DR: In this paper, a new catalytic spectrophotometric method for the determination of bromide is proposed, which is based on the bromides-catalyzed oxidation of this violet complex by iodate followed by measuring the color change at λ = 542 nm.
Abstract: A new catalytic spectrophotometric method for the determination of bromide is proposed. Diphenylcarbazide reacts with chromium(VI) ions in an acid medium to give a violet complex. The method is based on the bromide-catalyzed oxidation of this violet complex by iodate followed by measuring the color change at λ = 542 nm spectrophotometrically. The reaction starts after an induction period. Bromide ions catalyze this reaction, so that the induction period is decreased by the addition of Br–. The derivative of the absorbance with respect to time was calculated. The maximum absorbance difference (ΔAm) and thetime taken to reach the maximum difference (tm) were measured from the derivative curve. These values are used as the measured parameters for bromide determination. Under optimum conditions bromide can be determined in the range of 0.5–8 μg/mL. The detection limit is 0.25 μg/mL, and the relative standard deviation for ten replicate measurements of 1 μg/mL of bromide is 1.57%. The method was applied to the determination of bromide in the Persian Gulf water.

4 citations

Journal ArticleDOI
TL;DR: In this paper, the relative standard deviation is about 0.35% in the range of 5.8-100 mg of Cu in the case of commercial copper(I) chloride, copper powder and partially oxidized copper powder.
Abstract: Copper(I) can be determined in the presence of copper(II) by oxidation with an excess of potassium iodate, the copper(II) being masked with oxalate. The unconsumed iodate is determined iodimetrically and the total copper is then determined on the same solution by demasking with acid and iodide, followed by iodimetric titration. The method can be extended to include elemental copper which can be separated from copper(I) and copper(II) oxides by dissolving the oxides in an ammonium chloride-ascorbic acid solution. The separated copper metal can then be determined by the iodate procedure. The methods are accurate and reproducible and have been applied to the determination of commercial copper(I) chloride, copper powder and partially oxidized copper powder. The relative standard deviation is about 0.35% in the range of 5.8–100 mg of Cu.

4 citations

27 Feb 2002
TL;DR: In this article, the behavior of radioiodine and carbon-14 during spent fuel dissolution was studied in a bench-scale reprocessing test rig where 29 and 44 GWdt -1 spent fuels were respectively dissolved.
Abstract: Behavior of radioiodine and carbon-14 during spent fuel dissolution was studied in a bench-scale reprocessing test rig where 29 and 44 GWdt -1 spent fuels were respectively dissolved. Decontamination factor of AGS (silica-gel impregnated with silver nitrate) column for iodine-129 removal was measured to be more than 36,000. The measurement of iodine-129 profile in the adsorption column showed that the nuclide was effectively trapped by the adsorbent. Measurement of iodine-129 in the dissolver solution after the iodine-stripping operation using NO2 gas at 363 K, revealed that less than 0.57% of total iodine-129 generated, which was estimated by ORIGEN II calculation, was remained in the dissolver solution. Also, measurement of iodine-129 by an iodine-stripping operation from the dissolver solution using potassium iodate showed that another 2.72% of total iodine-129 precipitated as iodide. In addition, about 70 % of total iodine generated was measured in the AGS columns. Rest of iodine-129 was supposed to adsorb to a HEPA filter and the inner surface of dissolver off-gas lines. Those results on iodine-129 distribution were found to be almost identical to the results obtained in the study using iodine-131 as tracer and the results reported by other works. It was demonstrated that the two-steps iodine-stripping method using potassium iodate could expel additional iodine from the solution, more effectively than iodine-stripping operation using NO2 gas. Iodine-131 was also detected on the AGS columns at the spent fuel dissolution. Increasing burnup showed larger amount of iodine-131 since amount of curium-244 contained in the spent fuel increased with the burnup. Release of carbon-14 as carbon dioxide during dissolution was found to occur when the release of krypton-85. From the 14 CO 2 measurement, initial nitrogen-14 concentration in the fuel was estimated to be about several ppm, which was within the range reported.

4 citations

Journal ArticleDOI
03 Sep 1955-Nature
TL;DR: An experimental study in rats shows that the administration of a mixture of aqueous solutions of potassium iodide and potassium iodate induced favourable effects in cancer patients, and aims to investigate the mechanism behind this effect.
Abstract: As one of us (F. B. O.) had observed that the administration of a mixture of aqueous solutions of potassium iodide and potassium iodate induced favourable effects in cancer patients, we decided to carry out an experimental study in rats.

4 citations

Journal ArticleDOI
TL;DR: In this article, the time needed for a 40mV potential change is inversely proportional to concentration, and selectivity is improved by sweeping the sulphur dioxide formed in acidic EDTA-containing solution into the iodate solution.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202221
202116
202014
201912
201818