US4166009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for detecting elements
Assignee: FRAY DEREK JOHN 157 SHELFORD ROAD TRUMPINGTON CAMBRIDGE CB2 2ND
•
Filing: 1977-12-13
•
Granted: 1979-08-28
•
Expires: 1997-12-13
Abstract
Abstract A method for the detection or determination of an element in a substance comprising that element by monitoring the e.m.f. generated between the substance and a reference material, in which the reference material is a solid electrolyte comprising a β-alumina containing said element or a solid compound of said element separated from the substance by said electrolyte.
Inventors
- 👤 Derek J. Fray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:04
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/411; G01N27/4112; G01N27/4114
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
A method for the detection or determination of an element in a sample containing said element, including the steps of: (1) providing a solid electrolyte pellet comprising β-alumina containing the element to be detected or determined and a refractory material tube containing a reference electrode and a solid powder reference material of a compound of said element to be detected or determined which is solid at 750° C. and which is selected from the group consisting of: two phase β-alumina, a mixture of α-alumina and β-alumina, a molybdate and a vanadate, said pellet sealing one end of said tube and contacting said reference material at one surface thereof; (2) contacting a sample containing said element to be detected or determined with another electrode and the surface of the pellet opposite said first-mentioned surface; and (3) monitoring the e.m.f. generated between the two electrodes.
Claim 2
Independent Claim
143 words
A method for the detection or determination of an element in a sample containing said element, including the steps of: (1) providing a solid electrolyte pellet comprising β-alumina containing the element to be detected or determined and a refractory material tube containing a reference electrode and a solid powder reference material of a compound of said element to be detected or determined which is solid at 750° C. and which is selected from the group consisting of: two phase β-alumina, a mixture of α-alumina and β-alumina, a molybdate and a vanadate, said pellet sealing one end of said tube and contacting said reference material at one surface thereof; (2) contacting a sample containing said element to be detected or determined with another electrode and the surface of the pellet opposite said first-mentioned surface; and (3) monitoring the e.m.f. generated between the two electrodes.
Claim 3
Dependent Claim
30 words
The method as claimed in claim 1 wherein said reference material comprises a β-alumina selected from the group consisting of lithium, sodium, potassium, rubidium, copper, silver, thallium, iridium and gallium.
References Cited (Backward Citations)
US3404036A
Cited
US3773641A
Cited
US3918991A
Cited
US3895963A
Cited
US4049468A
Cited
US3977899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |