US4165219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analysis of solutions using chromatographic column
Assignee: BASF SE
•
Filing: 1977-01-27
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Granted: 1979-08-21
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Expires: 1997-01-27
Abstract
Abstract A process for the analysis of aqueous solutions, in which the sample is introduced into a stream of liquid color reagent and the reaction product formed in a chromatogaphic column under pressure is measured in a suitable detector.
Inventors
- 👤 Walter Huber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:13
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/34; G01N31/00; G01N35/00; G01N35/08; G01N35/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A process for analysis of aqueous or non-aqueous liquid solutions which comprises combining a sample of said liquid solutions with a stream of a liquid color reagent and reacting the sample and reagent under pressure as they pass through a chromatographic column which is filled with particles of inert, finely divided material with particle diameters in the range of 50 to 200 μm, and measuring the liquid reaction product in a photometric detector cell.
Claim 2
Dependent Claim
74 words
A process for analysis of aqueous or non-aqueous liquid solutions which comprises combining a sample of said liquid solutions with a stream of a liquid color reagent and reacting the sample and reagent under pressure as they pass through a chromatographic column which is filled with particles of inert, finely divided material with particle diameters in the range of 50 to 200 μm, and measuring the liquid reaction product in a photometric detector cell.
Claim 3
Dependent Claim
14 words
A process as set forth in claim 1, wherein the chromatographic column is heated.
Claim 4
Dependent Claim
57 words
A process as set forth in claim 1, wherein a stream of reagent and a stream of solvent are combined by means of pumps in order to achieve a defined ratio in which the reagent and sample are mixed, and the actual sample for analysis is introduced into the solvent stream by means of a sample loop.
Claim 5
Dependent Claim
24 words
A process as set forth in claim 1, wherein said finely divided material consists of glass beads of from 50 to 200 μm diameter.
References Cited (Backward Citations)
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Cited
US3996003A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |