Showing papers on "Potassium iodate published in 1968"
TL;DR: In this article, a method is described in which this interference is prevented by prior oxidation with potassium iodate in acidic solution, which can be used directly for trace amounts of ammonia, or following distillation when other interfering substances are present.
Abstract: Hydrazine is known to interfere in the determination of ammonia with Nessler's reagent. A method is described in which this interference is prevented by prior oxidation with potassium iodate in acidic solution. The method can be used directly for trace amounts of ammonia, or following distillation when other interfering substances are present.
35 citations
Patent•
20 Nov 1968
TL;DR: A reagent for detecting the presence of a saturated organic heterocyclic sulphide in a hydrocarbon, especially thiophane, is described in this article, where the reagent solution is obtained from a solution of potassium iodate in glacial acetic acid and sulphuric acid the solution being mixed with starch solution, palladium chloride, mercuric iodide, distilled water, dimethyl sulphoxide and methylene blue.
Abstract: 1,134,439 Detecting organic sulphides SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 17 Oct, 1967 [19 Oct, 1966], No 47314/67 Heading B1X [Also in Division G1] A reagent for detecting the presence of a saturated organic heterocyclic sulphide in a hydrocarbon, especially thiophane in a hydrocarbon comprises water dry, adsorptive, granular material impregnated with an acidic solution of an alkali metal iodate, a material for forming a colour with iodine and an organic sulphoxide and/or organic sulphone The reagent solution is preferably formed from a solution of potassium iodate in glacial acetic acid and sulphuric acid the solution being mixed with starch solution, palladium chloride, mercuric iodide, distilled water, dimethyl sulphoxide and methylene blue The reagent solution is added to silica gel and the mixture is heated in vacuum The reagent is then packed in a glass tube 12 in zones 12a separated by zones 12b of purified sand One end of the tube is connected to a balloon 14 whilst the other end is connected through a vapourising tube 10, a needle valve 5 and a valve 2 to a cylinder 1 of liquid hydrocarbon Gas is passed through the tube 12 until the balloon, fits snugly within a standard volume ring 15 The zones 12a are then examined, each zone which has completely changed in colour from blue to green denoting a concentration of 10 ppm by weight of thiophane The palladium chloride stabilizes the final colour of the reagent
15 citations
TL;DR: In this paper, a new method was given for the accurate microdetermination of a variety of oxidizing agents, including permanganate, chromate, dichromate, iodate, periodate, bromate and cerium(IV), by adding the oxidant to a known excess of standard iodide solution properly acidified with sulfuric acid, followed by titrating excess iodide with mercury(II) potentiometrically using a silver amalgam as indicator electrode.
12 citations
TL;DR: In this paper, a titrimetric method for the micro determination of soluble iodides is described, which is done within the limits of 20 mg to 50 μg for potassium iodide and from 15 to 1 mg with cadmium iodide.
8 citations