Patent US3660036A successfully refreshed from Google Patents.
US3660036A
Expired / Lapsed
US
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Analytical method and apparatus
Assignee: Monsanto Co
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Filing: 1969-12-22
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Granted: 1972-05-02
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Expires: 1989-12-22
Abstract
Abstract An improvement in a method for analyzing labile-hydrogencontaining compounds present in mixtures wherein the mixture is passed over a labile-tritium-containing substrate to effect exchange of the labile hydrogen with the labile tritium and the resulting tritium-containing compound is detected and measured, the radioactivity measurement being used to determine the amount of the labile-hydrogen-containing compound in the mixture, which comprises passing the effluent from the detecting means through a high capacity ''''tritium trap'''' containing a substance having labile-hydrogen atoms to prevent the venting of dangerous amounts of radioactive tritium-containing compounds into the atmosphere. The invention also provides the combination of a suitable ''''tritium trap'''' with an analytical system for carrying out the above method comprised of a column connected to the outlet of the detecting means and which contains a substance having labilehydrogen atoms.
Inventors
- 👤 Royal H Benson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:41
CPC Classifications
G; G21; G21H; G21H5/00; G21H5/02; G01; G01N; G01N23/00; G01N23/22; G01N23/221
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
24 words
The method of claim 1 wherein said contacting is carried out by passing said effluent through a column containing a bed of said substance.
Claim 2
Dependent Claim
25 words
The method of claim 1 wherein the amount of said substance is 10 times the amount by weight of said labile-tritium-containing compound in said effluent.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said substance is a fibrous solid.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said substance is a particulate solid.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said substance contains greater than 0.1 percent by weight of labile-hydrogen atoms.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said substance contains greater than 0.1 percent by weight of labile-hydrogen atoms.
Claim 7
Dependent Claim
139 words
In an analytical method for the detection and measurement of components convertible to labile-hydrogen-containing compounds wherein a sample mixture containing at least one component convertible to a labile-hydrogen-containing compound is subjected to a suitable conversion means, the resulting labile-hydrogen-containing compound is passed through a fixed phase of a labile-tritium-containing substrate such that the labile hydrogen in said labile-hydrogen-containing compound exchanges with the labile tritium of said substrate, and the resulting labile-tritium-containing compound is detected by suitable radioactivity detection means, the improvement wherein excessive amounts of said labile-tritium-containing compound in the effluent from said detecting means are prevented from release to atmosphere comprising contacting said effluent with a substance having labile-hydrogen atoms, said substance being present in an amount sufficient to effect substantially complete exchange of the labile tritium in said tritium-containing compound with the hydrogen in said labile-hydrogen-containing substance.
Claim 8
Dependent Claim
25 words
The method of claim 8 wherein said component convertible to said labile-hydrogen-containing compound is one selected from the group consisting of hydrocarbons, hydrogen and oxygen.
Claim 9
Dependent Claim
24 words
The method of claim 8 wherein said contacting is carried out by passing said effluent through a column containing a bed of said substance.
Claim 10
Dependent Claim
25 words
The method of claim 8 wherein the amount of said substance is 10 times the amount by weight of said labile-tritium-containing compound in said effluent.
Claim 11
Dependent Claim
12 words
The method of claim 8 wherein said substance is a fibrous solid.
Claim 12
Dependent Claim
12 words
The method of claim 8 wherein said substance is a particulate solid.
Claim 13
Dependent Claim
133 words
In a system for the analysis of samples containing compounds having labile-hydrogen atoms or components convertible thereto, comprising: an exchange column packed with a substrate containing labile-tritium atoms; means to introduce a sample into said system upstream from said exchange column; means to introduce a fluid carrier stream into said system, said carrier stream serving to transport said sample through said exchange coluMn; means for withdrawing the sample and carrier fluid from said exchange column; and means for detecting and measuring the radioactivity of the resulting tritium-containing compounds, the combination of a housing having an inlet and an outlet, said housing containing a substance having labile-hydrogen atoms, and means connecting the inlet of said housing with the outlet of said detecting means whereby the effluent from said detecting means flows through said housing.
Claim 14
Dependent Claim
36 words
The combination of claim 14 having means connected between where said sample is introduced into said system and said exchange column said means being for converting components present in said sample into compounds having labile-hydrogen atoms.
Claim 15
Dependent Claim
13 words
The combination of claim 15 wherein the conversion means comprises a combustion apparatus.
Claim 16
Dependent Claim
12 words
The combination of claim 14 wherein said housing comprises a tubular member.
Claim 17
Dependent Claim
17 words
The combination of claim 17 wherein said substance contains greater than 0.1 percent by weight labile-hydrogen atoms.
Claim 18
Dependent Claim
12 words
The combination of claim 18 wherein said substance is a particulate solid.
References Cited (Backward Citations)
US3560158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |