Showing papers on "Potassium iodate published in 2000"
TL;DR: In this article, a new sensitive method is proposed for the determination of traces of arsenic(III) in Rhodamine-B. The method involves bleaching of the pinkish red colored dye, Rhodamine B, by the action of iodine which is released by the reaction between potassium iodate and arsenic in slightly acidic medium.
51 citations
TL;DR: In this paper, the adsorption of iodate on a copper surface depends on the solution pH and the concentration of iodates, and the dissolution rate does not change significantly when the potassium iodate concentration is > 1 wt %.
Abstract: Copper dissolution was investigated using electrochemical techniques including potentiodynamic scans and electrochemical quartz crystal analysis. The adsorption of iodate on a copper surface depends on the solution pH and the concentration of iodate. IO3- behaves both as an oxidizer and a passivating agent for copper dissolution. At low IO3- concentrations, IO3- acts more like an oxidizer while it passivates the copper surface at higher concentrations. The copper dissolution rate decreases with increasing solution pH and increases with increasing concentration of potassium iodate up to 1 wt %. The dissolution rate does not change significantly when the potassium iodate concentration is >1 wt %. A strong adsorption of IO3- ions on a copper surface has been observed at higher solution pH's and higher iodate concentrations. This may be ascribed to the formation of a thin film of Cu(IO3)2 due to the high surface Cu2+ concentration and higher concentration of IO3- adjacent to the copper surface.
19 citations
TL;DR: In this article, a facile method to diacyl semicarbazides was described, where reactions of 4-chlorobenzoyl chloride with ammonium thiocyanate first, then with aryloxyacetic acid hydrazides under phase transfer catalysis gave 1-aryloxyacetyl-4-(4-carbazides)-thiosemicarazides (Ia-h).
12 citations
Patent•
01 Nov 2000
TL;DR: In this paper, a multi-element low-sodium nutritive salt with health-care function is prepared from vacuum crystallized and refined salt through crushing, sieving by 1.25 mm mesh, proportionally mixing with heptahydrated magnesium sulfate and potassium chloride, which have been pulverized and sieved by 1 mm mesh.
Abstract: A multi-element low-sodium nutritive salt with health-care function is prepared from vacuum crystallized and refined salt through crushing, sieving by 1.25 mm mesh, proportionally mixing with heptahydrated magnesium sulfate and potassium chloride, which have been pulverized and sieved by 1 mm mesh, mixing again while spraying the mother liquid of potassium iodate and sodium selenite on going through automatic distributor, baking at 80 deg.C in suspension state by hot air, sieving by 1 mm mesh, and mixing with activated calcium and zinc lactate in a helical cone type mixer. Its advantages are I, Ca, Zn and Se enriched nutrition, low content of sodium chloride and health-care function.
9 citations
TL;DR: In this article, a novel route to acyl ureas was described, where reaction of 5-(2-chlorophenyl)-2-furoyl chloride with ammonium thiocyanate first, then arylamine under phase transfer catalysis gives N-[5-(2]-2]-N'-arylthioureas (1a-o).
9 citations
Patent•
26 Jan 2000
TL;DR: In this article, a multi-component chemical etching agent for nickel-titanium alloy film is formed from 1%-25% (V) of fluohydric acid, 0.5%-155 (V), 2%-20% of hydrochloric acid and etching rate accelerating agent made up by using one kind of potassium iodate, sodium hypochlorite, peroxyacetic acid or hydrogen peroxide or several kinds of their mixtures as main component.
Abstract: The multi-component chemical etching agent for nickel-titanium alloy film is formed from 1%-25% (V) of fluohydric acid, 0.5%-155 (V) of nitric acid, 2%-20% (V) of hydrochloric acid and etching rate accelerating agent made up by using one kind of potassium iodate, sodium hypochlorite, peroxyacetic acid or hydrogen peroxide or several kinds of their mixtures as main component, and its service performance can be retained by supplementing consumed active components. Said invention possesses high stability for photoresist and several organic compounds, and can ensure the accuracy of graphic transfer, raise the capability for transferring complex mask pattern, and can raise the processed finished product rate and reduce the cost for processing product and treating waste water.
7 citations
Patent•
14 Mar 2000
TL;DR: In this paper, the authors used an oxidizing agent for organic film and abrasive slurry containing abrasive grains to perform chemical mechanical polishing (CMP) of an organic film represented by CFx.
Abstract: PROBLEM TO BE SOLVED: To perform chemical mechanical polishing(CMP) of an organic film represented by CFx by using an oxidizing agent for organic film and abrasive slurry containing abrasive grains SOLUTION: Abrasive slurry 14 containing oxidizing agent and abrasive grains is employed It may be added with a pH conditioning agent The oxidizing agent causes chemical reaction on an organic film W1 and includes acid oxidizing agent, eg H2O2 (hydrogen peroxide water), Fe(NO3)3 (iron(II) nitrate), KIO3 (potassium iodate), and alkaline oxidizing agent, eg KOH (potassium hydroxide), amine based salt such as hydrochloride amine or monoethanol amine, peroxo based compound The peroxo based compound contains peroxonitrate, peroxocarbonate, peroxo titanic acid, and peroxotitanate
7 citations
Patent•
02 May 2000
TL;DR: A hair lotion (I), effective against dandruff and alopecia, contains lactic acid, citric acid, panthenol or dexpanthenol, sodium selenite, potassium iodate, zinc sulfate, silicic acid and ascorbic acid, the remainder being distilled water (optionally mixed with alcohol).
Abstract: A hair lotion (I), effective against dandruff and alopecia, contains lactic acid, citric acid, panthenol or dexpanthenol, sodium selenite, potassium iodate, zinc sulfate, silicic acid and ascorbic acid, the remainder being distilled water (optionally mixed with alcohol). A hair lotion (I), effective against dandruff and alopecia comprises: (a) 1.0-10.0 wt.% lactic acid; (b) 0.5-10.0 wt.% citric acid; (c) 0.1-5.0 wt.% panthenol or dexpanthenol; (d) 0.1-5.0 wt.% sodium selenite; (e) 0-2.0 wt.% potassium iodate; (f) 0.1-5.0 wt.% zinc sulfate; (g) 0-5.0 wt.% silicic acid; (h) 0-5.0 wt.% ascorbic acid; and (i) the remainder is distilled water (optionally mixed with alcohol). - ACTIVITY : Antiseborrheic; antialopecia; antipruritic; dermatological; antifungal. - MECHANISM OF ACTION : None given.
2 citations
Journal Article•
TL;DR: A salt iodination programme was implemented with 14; 30 or 45 mg iodine/kg salt (as potassium iodate) which led to a 65% increase in the iodine content in foods prepared with iodinated salt.
Abstract: Iodine (I) intake averaged 33 μg/day among a subpopulation group from the New Valley, an I endemic area in the southern part of Egypt. A salt iodination programme was implemented with 14; 30 or 45 mg iodine/kg salt (as potassium iodate).This iodination led to a 65% increase in the iodine content in foods prepared with iodinated salt. The estimated iodine increased to 63 μg for this Egyptian subpopulation group. The results of the study predict that the optimum iodination level of salt would be 45 mg iodine/kg.
2 citations
01 Jan 2000
TL;DR: Two simple and accurate methods are described for the determination of N-substituted phenothiazine drugs and the proposed methods were applied to the analysis of pharmaceutical preparations containing these drugs.
Abstract: Two simple and accurate methods are described for the determination of N-substituted phenothiazine drugs The spectrophotometric method involves the oxidation of the sulphur atom in these drugs with potassium iodate in acid medium with the liberation of iodine and subsequent extraction with carbon tetrachloride followed by measuring the absorbance at 520 nm In the titrimetric method, a known excess volume of potassium iodate is added and, after a specified time, the residual reagent is determined iodometrically The stoichiometry of the reaction was assessed and a proposal for the reaction pathway is presented The proposed methods were applied to the analysis of pharmaceutical preparations containing these drugs
2 citations
TL;DR: In this article, a facile method to diacyl semicarbazides was described, where reactions of 4-chlorobenzoyl chloride with ammonium thiocyanate first, then with aryloxyacetic acid hydrazides under phase transfer catalysis gave 1-aryloxyacetyl-4-(4-carbazides)-thiosemicarazides (Ia-h).
Abstract: A facile method to diacyl semicarbazides is described. Reactions of 4-chlorobenzoyl chloride with ammonium thiocyanate first, then with aryloxyacetic acid hydrazides under phase transfer catalysis give 1-aryloxyacetyl-4-(4-chlorobenzoyl)-thiosemicarbazides (Ia-h). Compounds Ia-h on treatment with potassium iodate under reflux result in the formation of 1-aryloxyacetyl-4-(4-chlorobenzoyl)-semicarbazides (IIa-h) in excellent yields.