Showing papers on "Potassium iodate published in 2017"

Iodine biofortification of wheat, rice and maize through fertilizer strategy

Abstract: Iodine (I) deficiency is distinct from other micronutrient deficiencies in human populations in having a high endemic prevalence both in well-developed and in developing countries. The very low concentration of iodine in agricultural soils and cereal-based foods is widely believed to be the main reason of iodine deficiency in humans, especially in developing countries. In the present study, the possibility of using iodine containing fertilizers for agronomic biofortification of cereal grains with iodine was studied. The aim was to establish the best application method (to the soil or as foliar spray), the best form of iodine (potassium iodate or potassium iodide) and the optimal dose of iodine. Additionally, experiments were conducted to study transport of iodine in plants and localization of iodine within the grains. Experiments were conducted both under greenhouse conditions and in the field on wheat (Triticum aestivum) grown in Turkey and Pakistan, on rice (Oryza sativa) grown in Brazil, Thailand and Turkey and on maize (Zea mays) grown in Turkey. The iodine concentration in the grain, localization of iodine in different grain fractions of wheat (i.e., endosperm, bran and embryo) and iodine concentration of both brown rice and polished rice was analyzed. In short-term experiments, the translocation of iodine from older into younger leaves was also studied. Inductively coupled plasma mass spectrometry (ICP-MS) was used for analysis of iodine in plant and soil samples. In greenhouse experiments on wheat, soil-applied potassium iodide (KI) and potassium iodate (KIO3) at increasing rates (i.e., 0, 0.1, 0.25, 1, 2.5, 5, 10 and 20 mg I kg−1 soil) both iodine forms substantially increased iodine concentration in the shoot, with the highest shoot iodine resulting from the KI treatments. However, these soil treatments did not affect iodine concentrations in the wheat grain, with the exception of the highest iodine rates (i. e., 10 and 20 mg I kg−1 soil) which also depressed the grain yield. In contrast to the soil applications, foliar spray of KI and KIO3 at increasing rates during heading and early milk stages did enhance grain iodine concentrations up to 5- to 10-fold without affecting grain yield. Including KNO3 or a surfactant to the iodine containing foliar spray further increased the grain iodine concentration. In a short-term experiment using young wheat plants, it was found that iodine is translocated from older into younger leaves after immersion of the older leaves in solutions containing KI or KIO3. Adding KNO3 or a surfactant in the immersion solution also promoted leaf absorption and translocation of iodine into younger leaves. Field experiments conducted in different countries confirmed that foliar application with increasing rates of iodine significantly increased grain iodine concentrations in wheat, brown rice and maize. This increase was also found in the iodine concentration of the endosperm part of wheat grains and in polished rice. The results of the present study clearly show that foliar application of iodine containing fertilizers is highly effective in increasing grain iodine concentrations in wheat, rice and maize. Presented results suggest that iodine is translocated from shoot to grain by transport in the phloem. Spraying KIO3 up to the rate of 0.05% w/v is suggested as the optimal form and rate to be used in agronomic biofortification with iodine. The substantial increase in grain iodine concentrations could contribute to the prevention of iodine deficiency in human populations with low dietary iodine intake. The reasons behind the higher effectiveness of foliar-applications compared to the soil applications of iodine fertilizers in improving grain iodine concentration are discussed.

Reduction of iodate in iodated salt to iodide during cooking with iodine as measured by an improved HPLC/ICP-MS method

Abstract: Background: Iodate is a strong oxidant, and some animal studies indicate that iodate intake may cause adverse effects. A key focus of the safety assessment of potassium iodate as a salt additive is determining whether iodate is safely reduced to iodide in food. Objective: To study the reduction of iodate in table salt to iodide and molecular iodine during cooking. Materials and Methods: Fifteen food samples cooked with and without iodated salt were prepared in duplicate. The iodine in the cooked food was extracted with deionized water. The iodine species in the extracts were determined by using an improved high-performance liquid chromatography/inductively coupled plasma–mass spectrometry (HPLC/ICP–MS). The cooking temperature and the pH of the food were determined. Results: The conversion rate of iodate in iodated salt to iodide and molecular iodine was 96.4%±14.7% during cooking, with 86.8%±14.5% of the iodate converted to iodide ions and 9.6% ±6.2% converted to molecular iodine to lose. The limit of detection, limit of quantification, relative standard deviation and recovery rate of the method HPLC/ICP–MS were 0.70 μg/L for I − (0.69 μg/L for IO 3 − ), 2.10 μg/L for I − (2.06 μg/L for IO 3 − ), 2.6% and 101.6%±2.6%, respectively. Conclusion: Almost all iodate added to food was converted into iodide and molecular iodine during cooking. The improved HPLC/ICP–MS was reliable in the determination of iodine species in food extracts.

Validated spectrophotometric method to determine vardenafil and sildenafil in pharmaceutical forms using potassium iodide and potassium iodate

Abstract: Objective : To develop and validate simple, sensitive, precise and free of organic solvents method for the determination of sildenafil (SIL) and vardenafil (VAR) in bulk and pharmaceutical formulation. Methods : The method is based on the reaction of studied drugs with a mixture of potassium iodide and potassium iodate in an aqueous medium at (25±2 °C) to form yellow coloured triiodide ions (I 3 - ) within 45 min. The reaction is followed spectrophotometrically by measuring the absorbance at 288, 351 nm and 285, 351 nm for sildenafil and vardenafil respectively. Results : The effects of analytical parameters on the reported systems were investigated. Beer's law of SIL was obeyed in the range of (0.4-12) μg ml -1 and (0.6-16) μg ml -1 . Molar absorptivity was found to be (67.659 ×10 3 ) lmol/cmand (37.955×10 3 ) lmol/cm at 288 nm, 351 nm respectively. Beer's law of VAR was obeyed in the range of (0.2-13) μg/mland (0.5-40) μg/ml. Moreover, molar absorptivity’s were found to be (68.719 ×10 3 ) l mol -1 cm -1 and (26.691×10 3 ) l mol -1 cm -1 at 285 nm, 351 nm respectively. Conclusion : The proposed method has been applied to determine the components in dosage forms with an average recovery of 98.15% to 103.45% and the results have been found in good agreement with those results obtained by the reference methods .

Preparation method of bismuth oxyiodate photocatalyst

Abstract: The invention provides a preparation method of a bismuth oxyiodate photocatalyst. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate into a glycol solvent, stirring and dissolving to obtain a solution; adding potassium iodate into the solution so that a molar ratio of the added potassium iodate to the bismuth nitrate pentahydrate is 1: 1, and continuing to stir; placing an obtained precursor into a high-speed centrifuge for centrifugal washing at a centrifugation rate of 6000-8000 rpm, washing with deionized water and absolute ethanol to remove impurities; placing samples obtained by centrifugation into an oven for drying; taking out the dried samples and placing into a muffle furnace, calcining in an air atmosphere for 1-2 h at 250-350 DEG C to obtain the bismuth oxyiodate photocatalyst. The bismuth oxyiodate photocatalyst obtained by the preparation method provided by the invention has excellent photocatalytic performance under ultraviolet light and visible light and has good photocatalytic removal ability on gas-phase zero-valent mercury in power plants.

Synthesis and properties of polyaniline, poly(o-anisidine), and poly[aniline-co-(o-anisidine)] using potassium iodate oxidizing agent

Abstract: Polyaniline (PANI), poly(o-anisidine), and poly[aniline-co-(o-anisidine)] were synthesized by chemical oxidative polymerization with potassium iodate as an oxidizing agent in a hydrochloric acid (HCl) medium. The self-doped, doped, and undoped forms of these polymers were characterized by infrared spectroscopy, ultraviolet–visible spectroscopy, and the conductivity method. The observed decrease in the conductivity of the copolymer and poly(o-anisidine) with respect to PANI was attributed to the incorporation of methoxy moieties into the PANI chain. The homopolymer attained conductivity in the range of 3.75 × 10−3 to 7.40 S cm−1 after doping with HCl. The conductivity of the undoped form of poly[aniline-co-(o-anisidine)] and poly(o-anisidine) was observed to be lower than 10−5 S cm−1. The conductivity of the polymer sample decreased in the following order: PANI → poly[aniline-co-(o-anisidine)] → poly(o-anisidine). The undoped form of poly[aniline-co-(o-anisidine)] had good solubility in common organic solv...

Multi-effect active iodine disinfectant as well as preparation method and application thereof

Abstract: The invention discloses a multi-effect active iodine disinfectant, which is prepared from the following substances in percentages by weight: 1 to 12 percent of iodine, 0.1 to 2 percent of potassium iodate, 0.5 to 3 percent of potassium iodide, 20 to 50 percent of surfactant, 0.1 to 5 percent of organic acid, 5 to 30 percent of organic solvent, 0.5 to 5 percent of inorganic salt and the balance of purified water. The invention also provides a preparation method and application of the multi-effect active iodine disinfectant. The multi-effect active iodine disinfectant is mainly used for the disinfection of breeding houses, appliances, body surfaces and drinking water of livestock and poultry, the disinfection of a water body for aquaculture, the disinfection of an appliance for the aquaculture and the field of the prevention and the control on animal bacterial diseases in the aquaculture.

Potassium iodate purity determination by high precision coulometric titration: New measurement procedure implementation

Abstract: A modified measurement procedure for the purity determination of high purity potassium iodate is described. The procedure consists of the coulometric standardization of sodium thiosulfate by generated iodine, stoichiometric interaction of standardized sodium thiosulfate with potassium iodate and the coulometric titration of excess sodium thiosulfate by generated iodine. In the proposed measurement procedure a previously unused method of simultaneous reagents adding (potassium iodate and sodium thiosulfate solution) into a coulometric cell is implemented. A relative expanded uncertainty for the potassium iodate purity determination 0.011% (k = 2) has been achieved.

Povidone-iodine film-forming disinfectant, preparation method and application thereof

Abstract: The invention provides a povidone-iodine film-forming disinfectant, which comprises the following components by weight percentage: 5% of povidone-iodine, 0.1-0.5% of Carbomer, 1-10% of PVP and 0.1-0.5% of potassium iodate. The invention also discloses a preparation method and application of the povidone-iodine film-forming disinfectant. After long-term placement, the povidone-iodine film-forming disinfectant provided by the invention has a stable effective iodine content and pH, and is free of layering after long-time placement, the solution has good liquidity, and can form a layer of disinfectant protective film capable of disappear spontaneously, and can effectively prevent cow mastitis.

High-phosphorus chemical nickel-plating solution

Abstract: The invention discloses a high-phosphorous chemical nickel-plating solution which comprises a cylinder opening solution and a supplement solution. The cylinder opening solution contains nickel sulfate, sodium hypophosphite, citric acid, lactic acid, sodium acetate, succinic acid, potassium iodate, potassium iodide, nitrilotriacetic acid, cerous sulfate, copper sulfate, benzotriazole, benzimidazole with the concentration being 2-10 mg/L, 5-25 mL/L of OP-10 with the concentration being 5-25 mL/L and the balance pure water. The nickel-plating solution has the advantages that cost is low, the excellent plating ability is achieved, the cylinder opening solution is stable, glossiness is achieved, the magnetism level requirement is met, and the service life reaches 11.0 MTO; during the service life, the average sedimentation rate is 12-14 [mu]m/h, the phosphorus content of a plating layer is 10%-14%, the time for neutral salt spraying is longer than or equal to 96 h (the thickness of the plating layer is 18-25 [mu]m), and the time for a purification resistant nitric-acid test is longer than or equal to 8 min (the thickness of the plating layer is 18-25 [mu]m); the magnetism level is lower than or equals to 200 gamma (specifically, 1 gamma is equal to 1 nT, and in general, remanence in the aerospace field takes gamma as a unit), the western country standard is met, and the magnetism is required to meet the NMB magnetism level; and the plating solution is free of lead and cadmium, conforms to the RoHS command and is an environment-friendly high-phosphorous chemical nickel-plating solution.

Compound type active iodine disinfectant for livestock, preparing method and purpose thereof

Abstract: The invention discloses compound type active iodine disinfectant for livestock, composed of the following materials, by weight: 05-3% of iodine, 01-2% of potassium iodate, 05-3% of potassium iodide, 20-50% of non-ionic surface active agent, 1-5% of organic acid, 1-5% of cosolvent, 5-20% of inorganic acid and purified water The invention also provides a preparing method and purpose of compound type active iodine disinfectant for livestock, mainly used for aquaculture environmental disinfection, farming instruments disinfection, housing disinfection and animal body surface disinfection

Method for measuring acid value of tobacco essence

Abstract: The invention discloses a method for measuring the acid value of tobacco essence. The to-be-measured essence is dissolved with a 50% ethanol water solution, active carbon powder is added for treatment, and then the materials are filtered; a potassium iodate water solution and a potassium iodide water solution are added into filtrate for reacting, the materials are diluted with 50% ethanol water, and then a spectrophotometer is used for analysis at the 352nm wavelength. The result is obtained after drawing of a standard curve and calculating. The spectrophotometric method is applied to measuring the acid value of the essence for the first time. The recovery rate range ranges from 93.6% to 95.8%, and variable coefficients of three continuous measuring results are 0.00%. The method is easy and convenient to operate, high in analysis speed and high in accuracy and precision degree, and has good application prospects.

Analysis of iodine content in table salt

Abstract: Iodine is essential nutrients for human body. It is needed by thyroid gland to produce thyroxine hormone. Human body cannot produce iodine by itself. There are some sources of iodine in food such as seafood, milk, egg, fruit and vegetable that can be consumed to fulfill the daily needs. Table salt is one of iodine’s source that routinely consumed, based on SNI No. 3556:2010, it has to be fortified by potassium iodate of 30-80 ppm. Lack of iodine intake will lead a disorder called Iodine Deficiency Disorders (IDD) which generally manifested as mumps. In this research, the analysis of iodate content in table salt was done by formation of blue I2-starch complex. The several optimum conditions showed for this measurement such as maximum wavelength, type and concentration of acid, and complex stability time. Based on commercial table salt sample analysis, showed that only 50% of our sample contain suitable amount of iodine while the others contains lower or almost no iodine. Keyword; table salt, iodine, iodate, I 2 -starch complex

Spectrophotometric and potentiometric determination of some organophosphorus pesticides in bulk powder and in their dosage forms.

Abstract: Two simple, sensitive and precise methods were developed and validated for determination of diazinon, chlorpyrifos and temefos pesticides in bulk powder and dosage forms The spectrophotometric method involves the oxidation of these pesticides with potassium iodate in acidic medium with the liberation of iodine and subsequent extraction with cyclohexane followed by measuring the absorbance at λ = 520 nm Beer`s law is obeyed in the concentration range of 005–100 mg ml for diazinon and chlorpyrifos and 005–06 mg ml for temefos The apparent molar absorbitivities of the resulting coloured products are found to be 0539×103, 0368×103 and 0474×103 L mol−1 cm−1 for diazinon chlorpyrifos and 005–06 mg ml−1 for 0368×103 and 0474×103 L mol−1 cm−1 or diazinon, chlorpyrifos and temeos, respectively, whereas Sandell sensitivities are 05647, 09527 and 09841 µg cm −2, respectively The potentiometric method involves the direct titration of the studied pesticides with N-bromosuccinimide in acidic medium and the end point is determined potentiometricallyusing platinum indicator electrode The ratio of drug: NBS was 1:3 for diazinon andchlorpyrifos and 1:6 for temefos The proposed methods were successfully applied to the analysis of the studied pesticides in bulk powder and in dosage forms without interference from other additives

Aquaculture self-thickening high-content iodophor solution and method for preparing same

Abstract: The invention discloses aquaculture self-thickening high-content iodophor solution. The aquaculture self-thickening high-content iodophor solution is prepared from raw materials including, by weight, 40%-50% of polyglycol ether non-ionic surfactants, 10%-25% of amide type surfactants, 10%-13% of iodine, 1.0%-4.0% of potassium iodide, 0.1%-0.3% of potassium iodate, 0.5%-1.0% of auxiliaries and the balance water. The invention further discloses a method for preparing the aquaculture self-thickening high-content iodophor solution. The method includes adding the polyglycol ether non-ionic surfactants, the amide type surfactants and the iodine into a reaction kettle at the reaction temperatures of 50-60 DEG C and stirring the polyglycol ether non-ionic surfactants, the amide type surfactants and the iodine; adding the dissolved potassium iodide and the dissolved potassium iodate into the reaction kettle and carrying out reaction for 1-2 h; adding the dissolved auxiliaries into the reaction kettle, turning off a heating device and carrying out reaction for 30-60 min. The aquaculture self-thickening high-content iodophor solution and the method have the advantages that the content of available iodine can be increased, products have self-thickening performance after being diluted, and good sterilization and disinfection effects can be realized.

Composition for imporvement of human reproduction

Abstract: FIELD: pharmacology.SUBSTANCE: invention is a composition for women, comprising of L-arginine, magnesium citrate, ascorbic acid, Vitex agnus-castus extract containing aucubin, zinc citrate, tocopherol acetate, pyridoxine hydrochloride, riboflavin, folic acid, potassium iodate, sodium selenite and auxiliaries, wherein the components of the composition are in a certain ratio in milligrams per weight of 5000 mg sachet.EFFECT: improvement of the functional state of organs in the female reproductive system.4 tbl, 1 ex

Extinguishing pyrotechnic composition

Abstract: FIELD: chemistry.SUBSTANCE: extinguishing agents containing pyrotechnical composition (wt %): 42-51, potassium nitrate, potassium iodate, 26-28, 16-18 gassing component sorbitol, organic binder based fuel iditol 6-10 and thiourea. Thus iditol introduced in an amount of 5-7% by weight of the dry powder and in an amount of 1.3 wt % - in the form of a 50% spirit solution by mixing communication components.EFFECT: composition allows to make charges for the press technology and is characterized by high chemical activity and effective action in the suppression of fires due to the increased rate of combustion and dynamic environmentally friendly aerosol formation in the protected volume much lower concentration of extinguishing flame retardants.1 tbl, 5 ex

Treating agent for biorefractory substances in high-salinity organic wastewater

Abstract: The invention discloses a treating agent for biorefractory substances in high-salinity organic wastewater. The treating agent comprises a component A and a component B; the component A is prepared from, by weight, 20-50 parts of sulfuric acid, 10-20 parts of o-iodobenzoic acid, 10-20 parts of potassium bromate, 10-20 parts of potassium iodate and 20-50 parts of water; the component B is prepared from, by weight, 20-30 parts of sodium perchlorate, 10-20 parts of potassium perchlorate, 10-20 parts of potassium nitrate and 50-60 parts of water, wherein a weight ratio of the component A to the component B is 8:2. The treating agent is green, environmental friendly, high in oxidation performance and capable of quickly decomposing biorefractory organics in water to realize shape decline of COD values and also has an evident degradation effect on ammonia nitrogen in water. Therefore, the treating agent can be widely applied to removal of biorefractory organics in high-salinity wastewater of chemical engineering, coal chemical industry, oil extraction plants, refineries and the like and manifests technical progress.

Preparation process for iodine-enriched drinking water

Abstract: The invention provides a preparation process for iodine-enriched drinking water. The preparation process comprises the following steps: raw material preparation, grinding, sealing and iodine-enriched drinking water preparation, and in the raw material preparation step, the following raw material components are adopted: medical stone, zeolite and potassium iodate powder, and in the raw material preparation step, the following raw material components also are adopted: lithium carbonate powder, diatomite powder, Muyu stone powder, and quartz sand powder, wherein the density of the medical stone is 1.3g/cm , the silicon dioxide content is 70%, and the aluminium oxide content is 9.8%. The iodine content of the drinking water is 0.2-0.39mg/L.