Method of determining an amount of water in a sample using a sulfonic acid
AssigneeHoneywell International Inc.
InventorRoman Neufeld
Life of this patent
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Abstract
A first method for determining an amount of water in a sample includes the step of providing a reagent including: sulfur dioxide or a derivative thereof; a base; an optional hydrogen halide or hydrogen halide donor; a solvent; and a sulfonic acid; and the step of titrating the sample with the reagent. A second method for determining an amount of water in a sample includes the step of providing the aforementioned reagent, combining the sample with the reagent; and adding a source of iodine to the sample and/or the reagent. The reagent may alternatively consist essentially of sulfur dioxide or a derivative thereof; imidazole and/or a derivative thereof; an optional hydrogen halide or hydrogen halide donor; acetonitrile; methane sulfonic acid; and methanol and/or ethanol.
Claims20
A method for determining an amount of water in a sample, said method comprising the steps of:
- A. providing a reagent comprising:
- (1) sulfur dioxide or a derivative thereof;
- (2) a base;
- (3) an optional hydrogen halide or hydrogen halide donor;
- (4) a solvent;
- and
- (5) a sulfonic acid;
- and
- B. titrating the sample with the reagent.
A method for determining an amount of water in a sample, said method comprising the steps of:
- A. providing a reagent comprising:
- (1) sulfur dioxide or a derivative thereof;
- (2) a base;
- (3) an optional hydrogen halide or hydrogen halide donor;
- (4) a solvent;
- and
- (5) a sulfonic acid;
- and
- B. combining the sample with the reagent;
- and
- C. adding a source of iodine to the sample and/or the reagent.
A reagent for Karl-Fischer titrations, said reagent consisting essentially of:
- (1) sulfur dioxide or a derivative thereof;
- (2) imidazole and/or a derivative thereof;
- (3) an optional hydrogen halide or hydrogen halide donor;
- (4) acetonitrile;
- (5) methane sulfonic acid;
- and
- (6) methanol and/or ethanol and/or 1-methoxy-2-propanol and/or propylene glycol.
Dependencies are inferred from the claim text.