US4476712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling high purity water for trace ion determination
Assignee: Siemens Energy Inc
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Filing: 1979-08-06
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Granted: 1984-10-16
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Expires: 1999-08-06
Abstract
Abstract Apparatus is disclosed for collecting and concentrating trace ions from a pressurized aqueous sample in a sample line. A three-way valve is connected to the sample line which in one position can divert the sample into a syringe and in another position can close off the sample line and permit the sample to flow from the syringe through the three-way valve into a concentrator column. In an alternative apparatus, the sample line is connected to a tee which permits the diversion of the sample into a concentrator column connected to the tee. The other end of the concentrator column is joined to a syringe for drawing the sample through the concentrator column. Methods of operating the apparatus are also disclosed.
Inventors
- 👤 Gerald L. Carlson
- 👤 Warren E. Snider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:19
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/405; G01N30/00; G01N33/00; G01N33/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
Apparatus for collecting and concentrating trace ions from a pressurized aqueous sample in a sample line, comprising: (A) a three-way valve connected to said sample line; (B) a syringe connected to said three-way valve, whereby said sample can flow through said three-way valve into said syringe; and (C) a concentrator column connected to said three-way valve whereby said sample can flow from said syringe through said three-way valve into said concentrator column.
Claim 2
Dependent Claim
72 words
Apparatus for collecting and concentrating trace ions from a pressurized aqueous sample in a sample line, comprising: (A) a three-way valve connected to said sample line; (B) a syringe connected to said three-way valve, whereby said sample can flow through said three-way valve into said syringe; and (C) a concentrator column connected to said three-way valve whereby said sample can flow from said syringe through said three-way valve into said concentrator column.
Claim 3
Dependent Claim
21 words
Apparatus according to claim 1 wherein said syringe includes a drain at the end opposite the entry of said aqueous sample.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 1 including an ion chromatograph attached to said concentrator column to analyze said ions after they pass through said column.
Claim 5
Dependent Claim
67 words
Apparatus according to claim 1 including a timer, a motor for driving the plunger of said syringe, and means for automatically turning said three-way valve, whereby said timer periodically turns said three-way valve to flush and fill said syringe, turns said three-way valve to permit said aqueous sample to flow from said syringe to said concentrator, and activates said motor to drive the plunger of said syringe.
Claim 6
Independent Claim
61 words
A method of collecting and concentrating trace ions in a pressurized aqueous sample comprising flushing said aqueous sample through a syringe and filling said syringe with said aqueous sample, terminating the flow of said aqueous sample through said syringe, and forcing said aqueous sample from said syringe through a concentrator column, collecting and concentrating said trace ions in said concentrator column.
Claim 7
Independent Claim
61 words
A method of collecting and concentrating trace ions in a pressurized aqueous sample comprising flushing said aqueous sample through a syringe and filling said syringe with said aqueous sample, terminating the flow of said aqueous sample through said syringe, and forcing said aqueous sample from said syringe through a concentrator column, collecting and concentrating said trace ions in said concentrator column.
Claim 8
Dependent Claim
15 words
A method according to claim 5 wherein said syringe is flushed through a drain therein.
Claim 9
Dependent Claim
30 words
A method according to claim 5 including the additional last step of passing said aqueous sample from said concentrator column through an ion chromatograph to analyze for trace ions therein.
Claim 10
Dependent Claim
14 words
A method according to claim 5 wherein said method is periodically and automatically practiced.
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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |