Electrolytic solution fork Karl Fischer coulometric titration and method for water content determination using the electrolytic solution
AssigneeMitsubishi Chemical Corporation
InventorsHiromasa Kato, Naoko Katayama
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Abstract
An electrolytic solution for Karl Fischer coulometric titration is disclosed which consists mainly of an amine, sulfur dioxide, iodide ions, and a solvent which is a mixed solvent comprising (a) propylene carbonate and (b) a dialkylene glycol monoalkyl ether (wherein the alkylene groups and the alkyl group each have from 1 to 4 carbon atoms). The electrolytic solution, which is based on a less toxic solvent, has fewer side reactions with ketones and is useful in accurately determining the water content of ketones.
Claims20
An electrolytic solution for Karl Fischer coulometric titration comprising an amine, sulfur dioxide, iodide ions and a solvent free or in chemical association,
- wherein the solvent comprises (a) propylene carbonate and (b) a dialkylene glycol monoalkyl ether, in which the alkylene groups and the alkyl group each have from 1 to 4 carbon atoms.
An electrolytic solution for Karl Fischer coulometric titration, prepared by mixing an amine, sulfur dioxide, iodide ions, propylene carbonate and a dialkylene glycol monoalkyl ether, in which the alkylene groups and the alkyl groups each have from 1 to 4 carbon atoms.
A method for coulometrically determining the water content of a sample, comprising performing a Karl Fischer coulometric titration, wherein said titration is carried out in a solvent comprising (a) propylene carbonate and (b) a dialkylene glycol monoalkyl ether, in which the alkylene groups and the alkyl group each have from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.