US4046510A
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Method and an apparatus for determining the inorganic carbon content of a liquid
Assignee: Bayer AG
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Filing: 1976-07-27
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Granted: 1977-09-06
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Expires: 1996-07-27
Abstract
Abstract In a process for the determination of the inorganic carbon content of aqueous liquids, the sample to be examined, together with a carbon dioxide-free carrier gas, is introduced into a heated reaction chamber, where it is reacted with crystalline potassium bisulphate and/or a mixture of equal parts of potassium bisulphate and potassium sulphate to form carbon dioxide and water. The CO 2 generated is analyzed quantitatively in a CO 2 analyzer.
Inventors
- 👤 Wolf-Jurgen Becker
- 👤 Jacques Deprez
- 👤 Horst Lehnert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:36
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N33/182; Y; Y10; Y10T; Y10T436/00; Y10T436/23; Y10T436/235
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A method for determining the inorganic carbon content of aqueous liquids, wherein a sample of the liquid to be analysed, together with a carbon dioxide-free carrier gas, is introduced into a heated reaction chamber containing as a reagent crystalline potassium bisulphate and/or a mixture of equal parts of potassium bisulphate and potassium sulphate, with which the sample is reacted to form carbon dioxide and water and the carbon dioxide is fed to a carbon dioxide analyser.
Claim 2
Independent Claim
76 words
A method for determining the inorganic carbon content of aqueous liquids, wherein a sample of the liquid to be analysed, together with a carbon dioxide-free carrier gas, is introduced into a heated reaction chamber containing as a reagent crystalline potassium bisulphate and/or a mixture of equal parts of potassium bisulphate and potassium sulphate, with which the sample is reacted to form carbon dioxide and water and the carbon dioxide is fed to a carbon dioxide analyser.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein the potassium bisulphate, and the potassium sulphate, if present, is applied to an inert and porous granulate.
Claim 4
Dependent Claim
28 words
A method as claimed in claim 1, wherein the potassium bisulphate is present as a mixture of a porous granulate coated with potassium bisulphate and crystalline potassium bisulphate.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1, wherein the carrier gas is heated to the temperature prevailing in the reaction chamber before entering the reaction chamber.
Claim 6
Dependent Claim
55 words
A method as claimed in claim 1, wherein the carrier gas, together with the sample and/or the reaction products of the reaction between the sample and the reagent, is passed successively through a first layer comprising potassium bisulphate and a second layer consisting of a mixture of equal parts of potassium bisulphate and potassium sulphate.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 5, wherein the carrier gas, together with the reaction products of the reaction between the sample and the reagent is passed through a third layer comprising potassium sulphate.
Claim 8
Dependent Claim
18 words
A method as claimed in claim 1, wherein the temperature in the reaction chamber is above 100° C.
Claim 9
Dependent Claim
18 words
A method as claimed in claim 6, wherein the temperature in the reaction chamber is approximately 140° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |