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.

Flow Injection Determination of Vitamin C in Pharmaceutical Preparations by Differential Electrolytic Potentiometry

Abstract: Differential electrolytic potentiometry (DEP) was coupled with Flow injection analysis (FIA) technique for the determination of ascorbic acid in pharmaceutical preparations. Platinum electrodes were used as an indicating system to follow the oxidation of vitamin C with either potassium iodate, or potassium permanganate in an acidic medium. Univariate method was employed to optimize the variables such as the current density, the flow rate, the concentrations of the oxidants and the sulfuric acid. A current density of 40 μAcm -2 and a flow rate of 25 μlsec -1 were found to be optimum. The optimum concentrations of iodate and permanganate were 8.35 mM and 0.11 mM respectively. On using iodate as an oxidant the method showed a linear range of 12-130 μgml -1 , a detection limit of 9 μgml -1 and R2 of 0.999. In case of permanganate a linear range of 18-36 μgml -1 , a detection limit of 11 μgml -1 and an R2 of 0.996 were obtained. The procedure was applied successfully to the determination of vitamin C in commercial tablets. The results of this study were found to be statistically comparable with those obtained by official methods.

Preparation method of potassium iodide

Abstract: The invention relates to a preparation method of potassium iodide. The preparation method is implemented based on the following technical scheme: (1) adding 765 parts of iodine tablets in a reaction container with a stirrer, then adding distilled water, and stirring; slowly adding 337 parts of potassium hydroxide solution with the relative density of 1.3 under the state of stirring until the reaction is complete, wherein when the solution in the reaction is puce and the pH value of the solution is 5-6, potassium iodate crystals occur in the container; and (2) slowly adding 277 parts of formic acid solution in the solution to reduce the potassium iodate, then adding potassium hydroxide for regulating the pH value to 9-10, introducing steam, carrying out heat preservation for 1-2 hours, standing, filtering to remove undissolved substances so as to obtain a silvery solution, carrying out evaporation concentration until most crystals are separated out, carrying out cooling crystallization and centrifugal separation, and drying, so as to obtain a finished product. According to the preparation method of the potassium iodide, the potassium iodide can be safely, conveniently and reliably produced, and the large-scale production is ensured to be possible, thus the preparation method can be widely applied.

Electrochemical Mechanical Removal of Ta Films in Dihydroxybenzene Sulfonic Acid Solutions Containing Potassium Iodate

Abstract: Removal of Ta films has been investigated in solutions containing 2,5 dihydroxy benzene sulfonic acid and potassium iodate (KIO3) under conditions that exist during electrochemical mechanical polishing. Specifically, the films were abraded at low pressures ( 0.5 psi) on a polyurethane pad under galvanostatic conditions. Variables such as pH, KIO3 concentration, and current density have been investigated to develop an optimized formulation. The nature of the oxide film formed on tantalum during the electrochemical abrasion process was investigated using x-ray photoelectron spectroscopy and nanoindentation techniques. VC 2011 The Electrochemical Society. [DOI: 10.1149/1.3535269] All rights reserved.

Preparation of iodized salt for goitre prophylaxis.

Abstract: The methods employed for iodizing free-running salts are discussed. They are not suitable for the iodization of coarse crystalline salts and a new process has been devised by the Chilean Iodine Educational Bureau of London for the iodization of open-pan and solar evaporated salts. This process is described and illustrated by photographs of suitable plants. Attention is drawn to the advantages of potassium iodate as an iodizing agent.

PVC membrane sensor based on periodate—Cetylpyridinium ion pair for the potentiometric determination of periodate

Abstract: A new plasticized membrane sensor has been proposed for the determination of periodate based on periodate ⎯cetylpyridinium ion pair complex. The electrode shows a linear, reproducible and stable poten� tiometric response with anionic Nernstian slope of 58.1 ± 0.5 mV/decade over a wide range of concentrations 10 -5 -10 -2 M and a detection limit of 2.0 × 10 -6 M of IO4 . The membrane exhibits a fast response time of 30-40 s which is independent of pH in the range 2.0-9.0. The selectivity coefficients indicate excellent selec� tivity for periodate over a large number of anions, e.g. iodide, bromide, chloride, iodate, bromate, nitrate, sul� fate, phosphate, thiocyanate, chromate, thiosulfate, sulfite, perchlorate, citrate, acetate, oxalate, and nitrate. The prepared sensor has been successfully used for the determination of periodate (IO4 - ) and iodate (IO 3 ) ions with an average recovery of 99.84 ± 0.34% and 98.22 ± 0.43%, respectively. It is also applied to the deter� mination of hydrazine compounds and aminophenol derivatives with an average recovery of 98.66 ± 0.53% and 98.40 ± 0.56%, respectively. Also, the proposed sensor was used for the determination of potassium iodate in iodized table salt and hydrazine in steam boiler feed water and paminophenol. The results obtained are in good agreement with those obtained by standard methods.