Showing papers on "Potassium iodate published in 2010"
TL;DR: In this article, the technique of iodide estimation in brine by ion chromatography with amperometric detection was applied to iodate estimation in salt and the method involved reduction of iodate to iodide with excess sodium bisulphite followed by estimation of the iodide.
51 citations
TL;DR: The developed catalytic kinetic method was found to be sensitive, selective and was applied to the determination of thiourea in fruit juices and orange peel with good precision, accuracy and the detection limit was 0.008 mg L(-1).
34 citations
TL;DR: In this article, the effect of additives (CuO, MnO2 and TiO2) on the thermal decomposition kinetics of KIO4 to KIO3 has been studied in air by thermogravimetry under isothermal conditions.
Abstract: The effect of additives (CuO, MnO2 and TiO2) on the thermal decomposition kinetics of potassium metaperiodate (KIO4) to potassium iodate (KIO3) has been studied in air by thermogravimetry under isothermal conditions. Irrespective of whether p- or n-type, the metal oxides show only a little or no influence on the rate of the decomposition except for the small decrease when the oxide concentration is as high as 10 wt%. The rate law for the decomposition of KIO4 (Prout–Tompkins model) remained unaffected by the additives.
23 citations
TL;DR: It is put forward that only those protein reactions that occur during baking contribute to the formation of a network that supports final cake structure and prevents collapse.
Abstract: This study investigates the impact of the oxidants potassium bromate and potassium iodate (8, 16, 32, 64, and 128 micromol/g dry matter of egg white protein) on pound cake making. The impact of the oxidants on egg white characteristics was studied in a model system. Differential scanning calorimetry showed that the oxidants caused egg white to denature later. During heating in a rapid visco analyzer, the oxidants caused the free sulfhydryl (SH) group levels to decrease more intensively and over a smaller temperature range. The oxidants made the proteins more resistant to decreases in protein extractability in sodium dodecyl sulfate containing buffer during cake recipe mixing and less resistant to such decreases during cake baking. We assume that, during baking, the degree to which SH/disulfide exchange and SH oxidation can occur depends on the properties of the protein at the onset of the process. In our view, the prevention of extractability loss during mixing increased the availability of SH groups and caused more such loss during baking. During cooling, all cakes baked with added oxidants showed less collapse. On the basis of the presented data, we put forward that only those protein reactions that occur during baking contribute to the formation of a network that supports final cake structure and prevents collapse.
18 citations
TL;DR: In this paper, a kinetic spectro-photometric method for determination of cefradine anhydrous, cefaclor monohydrate, ce-fadroxil monohydrate and cefixime in bulk and in pharmaceutical formula-tions has been developed.
Abstract: A simple, precise and accurate kinetic spectro-photometric method for determination of ce-fradine anhydrous, cefaclor monohydrate, ce-fadroxil monohydrate, cefalexin anhydrous and cefixime in bulk and in pharmaceutical formula-tions has been developed. The method based on a kinetic investigation of the reaction of the free carboxylic acid group of the drug with a mixture of potassium iodate and potassium iodide at room temperature to form yellow coloured triiodide ions. The reaction was followed up spectrophotometrically by measuring the increase in absorbance at 352 nm as a function of time. The initial rate, fixed time, variable time and rate-constant methods were adopted for constructing the calibration curves but fixed time method has been found to be more applicable. The analytical performance of the method, in terms of accuracy and precision, was statistically validated; the results were satisfactory. The method has been successfully applied to the determination of the studied drugs in commercial pharmaceutical formulations. Statistical comparison of the results with a well established reported method showed excellent ag- reement and proved that there is no significant difference in the accuracy and precision.
17 citations
TL;DR: In this article, the effect of pre-compression, pre-heating and particle size on the thermal decomposition kinetics of KIO 4 to KIO 3 was investigated by thermogravimetric analysis under isothermal conditions.
15 citations
TL;DR: In this paper, metal-assisted electroless etching of silicon in HF-oxidizing agent aqueous solutions was investigated and the effect of oxidizing agent and HF content on the characteristics of the formed porous layers was investigated.
10 citations
01 Jan 2010
TL;DR: A simple and sensitive spectrophotometric method was developed and validated for the determination of mesalamine in bulk and pharmaceutical formulations and validated with respect to accuracy, precision, specificity, ruggedness, and robustness, limit of detection and limit of quantitation.
Abstract: A simple and sensitive spectrophotometric method was developed and validated for the determination of mesalamine in bulk and pharmaceutical formulations. The method was based on the reaction of drug with the mixture of potassium iodate and potassium iodide. The method was linear in the range of 15-50μg/ml. The absorbance was measured at 487nm. The method was validated with respect to accuracy, precision, specificity, ruggedness, and robustness, limit of detection and limit of quantitation. Thus a simple and precise method has been developed.
9 citations
Patent•
18 Aug 2010
TL;DR: In this article, a method and device to produce mannitol and potassium iodate by electrolysis is presented, which uses the anion membrane or dipole membrane as septum; the temperature is 30-60deg.C, current flow density is 3.0-5.0A/dm2.
Abstract: The invention provides the method and device to produce the mannitol and potassium iodate by electrolysis. The potassium iodate is produced by electrolyzing the I2 in anode and the mannitol is produced by electrolyzing the sucrose in cathode. The beta -PbO2/Ti is as anode and the stainless steel, the nickel plate are as cathode. It uses the anion membrane or dipole membrane as septum; the temperature is 30-60deg.C, the current flow density is 3.0-5.0A/dm2. The anode solution is the KOH solution with I2; the cathode solution is sucrose hydrolyzing solution and Raney' s nickel catalyzer. After electrolyzing, the anode solution rime to get the potassium iodate and cathode solution include the mannitol and sorbitol; so by controlling the temperature and rime, we can get the mannitol product, the electrolysis efficiency can reach above 150%.
6 citations
Patent•
23 Jun 2010
TL;DR: In this article, a method for determining the starch content in tobacco was proposed, which comprises the following steps: weighing a dried and smashed tobacco sample, placing in a beaker, adding distilled water for boiling, cooling, then setting the volume by using the distilled water, shaking up, filtering and preparing a sample reagent; setting the volumes of 75-85% phosphoric acid by using distillated water, adding a 22% polyoxyethylene lauryl ether reagent, and preparation of a standard stock solution reagent.
Abstract: The invention relates to a method for determining the starch content in tobacco, which comprises the following steps: weighing a dried and smashed tobacco sample, placing in a beaker, adding distilled water for boiling, cooling, then setting the volume by using the distilled water, shaking up, filtering and preparing a sample reagent; setting the volume of 75-85% phosphoric acid by using the distillated water, adding a 22% polyoxyethylene lauryl ether reagent, and preparing a phosphoric acid reagent; weighing potassium iodate and potassium iodide, setting the volume by using the distilled water, adding the 22% polyoxyethylene lauryl ether reagent, and preparing a potassium iodate/potassium iodide reagent; weighing amylase and amylopectin, commonly dissolving in the distilled water, setting the volume and preparing a standard stock solution reagent; and sequentially carrying out sample injection on all the reagents through the program run of a continuous flow analyzer, and determining the starch content in the sample at a certain wavelength. The method can save the reagents, eliminate the potential safety hazard of experimental staff, protect the instrument and lead the determined starch content in the tobacco to be closer to the true value.
TL;DR: In this article, a new plasticized membrane sensor has been proposed for the determination of periodate based on periodate ⎯cetylpyridinium ion pair complex, which exhibits 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.
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.
TL;DR: In this paper, the authors aimed at increasing the level of iodine in commonly consumed vegetables by iodization of irrigation water with potassium iodate, and the results obtained showed that the increase in iodine concentration in fluted pumpkin ranged from 89.02 ± 0.31 to 140.36 ± 1.05 ig/100g in week 6.
Abstract: Iodine is a trace element in soil and water that is involved in some important metabolic functions in human development. In many areas of the world, the surface soil becomes progressively poorer in iodide through accelerated deforestation, flooding and soil erosion. Hence, the food grown in iodine deficient regions can never provide enough iodine for the people and livestock living there. This study was aimed at increasing the level of iodine in commonly consumed vegetables by iodination of irrigation water with potassium iodate. The results obtained showed that, the increase in iodine concentration in fluted pumpkin ranged from 89.02 ± 0.31 to 140.36 ± 1.08 ig/100 g in week 4 and 102.86 ± 0.60 to 115.89 ± 0.05 ig/100g in week 6. The increase in iodine concentration in the vegetable marrows ranged from 60.879 ± 0.32 to 76.786 ± 0.16 ig/100 g in week 4 and 62.078 ± 0.09 to 107.679 ± 0.24 ig/100 g in week 6. The increase in iodine concentration in water leaf ranged from 61.59 ± 0.24 to 73.41 ± 0.83 ig/100 g in week 4 and 62.06 ± 0.09 to 96.25 ± 0.025 ig/100 g in week 6. From the results, the vegetables treated with 40 ig/l potassium iodate showed the highest iodine level in week 4. These results from this iodine biofortification studies, suggest that the iodine added to the soil increased iodine uptake by the vegetables. Suggesting that iodination of irrigation water is an advantageous and cost-effective method of supplying iodine, since it requires simple technology. Key words : Fortification, iodine deficiency disorders, iodination, irrigation, potassium iodate.
Journal Article•
TL;DR: In this article, the authors used optical, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) to study the surface morphology, the composition of adsorbed film formed on the surface of aluminum samples in 2M hydrochloric acid solution containing 100 ppm optimum KIO3 dose.
Abstract: The results of investigations by using optical, scanning electron microscopy (SEM) and energy dispersive X- ray spectroscopy (EDS) to study the surface morphology, the composition of adsorbed film formed on the surface of aluminum samples in 2M hydrochloric acid solution containing 100 ppm optimum KIO3 dose. The data reveal that the additive improves the surface morphology of aluminum, due to the marked layer enrichment of Al- surface by inhibitor components. Detailed studies were carried out to investigate the effect of oxygen in the inhibition process. The nature and strength of the passive film and the mechanism of its formation are explained based on detailed studies conducted under experimental conditions.
TL;DR: In this paper, a glycine potassium iodate (GPI) has been grown from aqueous solution by slow evaporation technique at room temperature and the chemical and structural units have been verified and the crystals were found to be thermally stable up to 210°C.
Patent•
23 Jul 2010
TL;DR: In this paper, a method for measuring choline in full blood using a choline oxidase, peroxidase and oxidative coloring agent includes a step of coexisting and reacting the hemolyzed full blood, a potassium iodate or sodium iodate, hydroxylamine or salt thereof in a solution.
Abstract: PROBLEM TO BE SOLVED: To provide a method for measuring choline in full blood and a composition for measurement.SOLUTION: The method for measuring the choline in full blood using a choline oxidase, peroxidase and oxidative coloring agent includes a step of coexisting and reacting the hemolyzed full blood, a potassium iodate, sodium iodate, hydroxylamine or salt thereof in a solution.
Journal Article•
TL;DR: In this article, the authors used optical, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) to study the surface morphology, the composition of adsorbed film formed on the surface of aluminum samples in 2M hydrochloric acid solution containing 100 ppm optimum KIO3 dose.
Abstract: The results of investigations by using optical, scanning electron microscopy (SEM) and energy dispersive X- ray spectroscopy (EDS) to study the surface morphology, the composition of adsorbed film formed on the surface of aluminum samples in 2M hydrochloric acid solution containing 100 ppm optimum KIO3 dose. The data reveal that the additive improves the surface morphology of aluminum, due to the marked layer enrichment of Al- surface by inhibitor components. Detailed studies were carried out to investigate the effect of oxygen in the inhibition process. The nature and strength of the passive film and the mechanism of its formation are explained based on detailed studies conducted under experimental conditions.
Patent•
21 Jan 2010
TL;DR: In this paper, a method for manufacturing activated carbon by non-electrolysis copper/iodine plating treatment includes the following steps of: performing a pre-processing step removing foreign materials and activating activated carbon surface; performing electroless plating by dipping the activated carbon in iodine compounds and cupric compounds to form a copper iodine reactor on the activation surface; and drying and washing the activation carbon.
Abstract: PURPOSE: A method for manufacturing activated carbon, a filter and a mask including activated carbon manufactured thereby are provided to offer good antibacterial property while maintaining adsorption property of harmful gas. CONSTITUTION: A method for manufacturing activated carbon by non-electrolysis copper/iodine plating treatment includes the following steps of: performing a pre-processing step removing foreign materials and activating activated carbon surface; performing electroless plating treatment by dipping the activated carbon in iodine compounds and cupric compounds to form a copper iodine reactor on the activated carbon surface; and drying and washing the activated carbon. The iodine compound is one or more mixture selected from iodination potassium, iodine, and potassium iodate. The cupric compound is one or more mixture selected from copper nitrate, copper sulfate, and copper acetate.
01 Jun 2010
TL;DR: In this paper, the synthesis of polyaniline has been reported using three different oxidative reagents: ammonium persulfate, potassium iodate and potassium iodates+sodium hypochlorite.
Abstract: The synthesis of polyaniline has been reported using three different oxidative reagents: ammonium persulfate, potassium iodate and potassium iodate+sodium hypochlorite. This polyaniline has been used to prepare several nanocomposites with different percentage of Montmorillonite. The DC conductivity of the nanocomposites was determined by impedance spectroscopy. The oxidative reagent that gives higher conductivity is ammonium persulfate. The temperature dependence of the conductivity was studied.