US3935449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for calibration measurement in a liquid scintillation counter and carrier used in the method
Assignee: Wallac Oy
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Filing: 1973-11-02
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Granted: 1976-01-27
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Expires: 1993-11-02
Abstract
Abstract The present invention relates to a method for use in liquid scintillation measurements to feed an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement. According to the invention an accurately determined amount of radioactive substance is adsorbed to a carrier, which is introduced into the fluid scintillation system. The invention also relates to a carrier for use in the method.
Inventors
- 👤 Matti Antero Reunanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:19
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/204; G01T1/2042; G01T1/2047
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
60 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of feeding of a carrier to said fluid scintillation system, said carrier having the radioactive substance adsorbed to it, and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 2
Dependent Claim
60 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of feeding of a carrier to said fluid scintillation system, said carrier having the radioactive substance adsorbed to it, and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 3
Dependent Claim
83 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of supplying of a fluid scintillation system into a measurement vial, introducing into said measurement vial a carrier having adsorbed to it a radioactive substance of a type soluble in said fluid scintillation system, immersing said carrier into said fluid scintillation system and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 4
Dependent Claim
83 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of supplying of a fluid scintillation system into a measurement vial, introducing into said measurement vial a carrier having adsorbed to it a radioactive substance of a type soluble in said fluid scintillation system, immersing said carrier into said fluid scintillation system and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 5
Dependent Claim
25 words
Method according to claim 2 where said fluid scintillation system is based on water as solvent, in which said radioactive substance is radioactively marked saccharose.
Claim 6
Dependent Claim
25 words
Method according to claim 2 where said fluid scintillation system is based on a non-polar solvent, in which said radioactive substance is radioactively marked tripalmitate.
Claim 7
Dependent Claim
25 words
Method according to claim 2 where said fluid scintillation system is based on a non-polar solvent, in which said radioactive substance is radioactively marked tristearate.
Claim 8
Dependent Claim
75 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of introducing into a measuring vial a carrier having a radioactive substance adsorbed to it, supplying into said measurement vial a fluid scintillation system of a type in which said radioactive substance is soluble, and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 9
Dependent Claim
75 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of introducing into a measuring vial a carrier having a radioactive substance adsorbed to it, supplying into said measurement vial a fluid scintillation system of a type in which said radioactive substance is soluble, and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 10
Dependent Claim
25 words
Method according to claim 6 where said fluid scintillation system is based on water as solvent, in which said radioactive substance is radioactively marked saccharose.
Claim 11
Dependent Claim
25 words
Method according to claim 6 where said fluid scintillation system is based on a non-polar solvent, in which said radioactive substance is radioactively marked tripalmitate.
Claim 12
Dependent Claim
25 words
Method according to claim 6 where said fluid scintillation system is based on a non-polar solvent, in which said radioactive substance is radioactively marked tristearate.
Claim 13
Dependent Claim
93 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of dosing of an accurately determined amount of a solution to a carrier, said solution comprising a volatile solvent and a radioactive substance of low volatility, followed by evaporation of said solvent, introducing said carrier having said radioactive substance adsorbed to it, together with a fluid scintillation system into a measurement vial and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 14
Dependent Claim
93 words
Method for feeding an accurately determined amount of radioactive substance to a fluid scintillation system for a calibration measurement in a liquid scintillation counter, the method comprising the steps of dosing of an accurately determined amount of a solution to a carrier, said solution comprising a volatile solvent and a radioactive substance of low volatility, followed by evaporation of said solvent, introducing said carrier having said radioactive substance adsorbed to it, together with a fluid scintillation system into a measurement vial and allowing said radioactive substance to dissolve in said fluid scintillation system.
Claim 15
Dependent Claim
39 words
Carrier for use in a calibration measurement when feeding to a fluid scintillation system an accurately determined amount of radioactive substance, said carrier comprising a bowl-shaped element having said radioactive substance adsorbed to part of its concave inner surface.
Claim 16
Dependent Claim
39 words
Carrier for use in a calibration measurement when feeding to a fluid scintillation system an accurately determined amount of radioactive substance, said carrier comprising a bowl-shaped element having said radioactive substance adsorbed to part of its concave inner surface.
Claim 17
Dependent Claim
13 words
Carrier according to claim 11, consisting of a cylinder, closed at one end.
Claim 18
Dependent Claim
10 words
Carrier according to claim 11, consisting of a transparent material.
Claim 19
Dependent Claim
8 words
Carrier according to claim 12, consisting of glass.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |