Titration agent and method for using same
AssigneeRiedel-de Haen Aktiengesellschaft
InventorEugen Scholz
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Abstract
For the titrimetric determination of small amounts of water, the Karl Fischer reagent is used which contains sulfur dioxide, iodine and pyridine as essential components. Replacement of pyridine by specific nitrogen bases is advantageous. Particularly suitable are selected aliphatic amines and nitrogen-containing heterocyclic compounds, especially imidazoles. The pyridine-free titration agent is distinguished by high storage stability; it can be used as bicomponent or monocomponent reagent.
Claims8
A Karl Fischer titration agent capable of detecting moisture in a substance, said agent containing an amine, sulfur dioxide and iodine, wherein the amine is a five- or six-membered heterocyclic compound having at least two hetero-atoms, at least one of the hetero-atoms being a nitrogen atom and the molar ratio of heterocyclic compound to sulfur dioxide being from 10:1 to 0.3:1.
A Karl Fischer titration agent capable of detecting moisture in a substance, said agent consisting of an amine, sulfur dioxide, iodine and an anhydrous low-molecular weight alcohol, wherein the amine is a five- or six-membered heterocyclic compound having at least two hetero-atoms, at least one of the hetero-atoms being a nitrogen atom, the molar ratio of heterocyclic compound to sulfur dioxide being from 10:1 to 0.3:1.
Dependencies are inferred from the claim text.