GB1403075A - Combustion method for preparing samples for liquid scintillation counting - Google Patents

Combustion method for preparing samples for liquid scintillation counting

Info

Publication number
GB1403075A
GB1403075A GB5548172A GB5548172A GB1403075A GB 1403075 A GB1403075 A GB 1403075A GB 5548172 A GB5548172 A GB 5548172A GB 5548172 A GB5548172 A GB 5548172A GB 1403075 A GB1403075 A GB 1403075A
Authority
GB
United Kingdom
Prior art keywords
oxygen
solvent
sample
source
samples
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5548172A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GD Searle LLC
Original Assignee
GD Searle LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GD Searle LLC filed Critical GD Searle LLC
Publication of GB1403075A publication Critical patent/GB1403075A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/32—Gas-filled discharge tubes
    • H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
    • H01J37/32055—Arc discharge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/20—Measuring radiation intensity with scintillation detectors
    • G01T1/204—Measuring radiation intensity with scintillation detectors the detector being a liquid
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T436/00—Chemistry: analytical and immunological testing
    • Y10T436/21—Hydrocarbon

Abstract

1403075 Processing radioactive material G D SEARLE & CO 1 Dec 1972 55481/72 Heading G6R [Also in Division H5] Apparatus for the preparation of samples of chemical or radioactive analysis, in particular the preparation of samples of biological origin for liquid scintillation counting comprises a reaction chamber 2 supplied with oxygen through a separate pipe (Fig. 1, not shown), or a hollow electrode 6 as shown, a semple holder 12 mounted on a metal base plate 14, and a source 8 connected between plate 14 and electrode 6, to produce a spark discharge of sufficient energy to convert the oxygen at least partly to singlet and triplet oxygen which reacts with the sample the discharge being maintained until combustion is complete. Exhaust gases are vented through an upper outlet 16 and are collected in absorption solvents or in a condensation chamber. If the sample 10 is wet it may be dried by preheating the oxygen to more than 100‹ C., by directing heated air on to the chamber walls or by an electric heater beneath the plate 14. The source 8 is preferably a 40,000-80,000 alternating voltage source. Preheated nitrogen may be injected prior to introducing oxygen to drive off volatile sample ingredients which would explode in the presence of oxygen. The apparatus is particularly suitable for producing oxidation products of C<SP>14</SP>, S<SP>35</SP> or H<SP>3</SP>. For counting tritium as tritiated water a mixture of methyl alcohol and toluene with a PPO, i.e. 2,5-diphenyloxazole, phosphor and a POPOP, i.e. p-bis-[2-(5-phenyloxyazolyl)] benzene, spectrum shifter is used as solvent. For C<SP>14</SP> an amine such as ethylamine or phenylamine is used as the scintillation, solvent, any well known phosphors being included in the solvent. Sodium hydroxide or similar basic chemical solutions can be used to trap carbon dioxide.
GB5548172A 1971-12-01 1972-12-01 Combustion method for preparing samples for liquid scintillation counting Expired GB1403075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00203796A US3844716A (en) 1971-12-01 1971-12-01 Combustion method apparatus for preparing samples for liquid scintillation counting

Publications (1)

Publication Number Publication Date
GB1403075A true GB1403075A (en) 1975-08-13

Family

ID=22755357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5548172A Expired GB1403075A (en) 1971-12-01 1972-12-01 Combustion method for preparing samples for liquid scintillation counting

Country Status (7)

Country Link
US (1) US3844716A (en)
JP (1) JPS4868297A (en)
CA (1) CA966197A (en)
DE (1) DE2255774A1 (en)
FR (1) FR2164214A5 (en)
GB (1) GB1403075A (en)
NL (1) NL7216262A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2326596A1 (en) * 1973-05-24 1974-12-05 Siemens Ag METHOD AND DEVICE FOR DETERMINING GAS CONTENT
DE2605560C3 (en) * 1976-02-12 1979-08-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Digestion process for biomaterials
US4116632A (en) * 1977-05-31 1978-09-26 Packard Instrument Company, Inc. Countercurrent combustion system for preparing radioactive samples and the like
DD268843A3 (en) * 1982-12-30 1989-06-14 Akad Wissenschaften Ddr Apparatus for plasma-chemical low-temperature ashing of oxidizable carbonaceous materials
US4582004A (en) * 1983-07-05 1986-04-15 Westinghouse Electric Corp. Electric arc heater process and apparatus for the decomposition of hazardous materials
JPH07238825A (en) * 1994-02-25 1995-09-12 Toyota Motor Corp Catalyst device with electric heater
WO1995028633A1 (en) * 1994-04-14 1995-10-26 William Henry Marlow Measurement of precursors to detonation and/or deflagration
US6001308A (en) * 1994-04-14 1999-12-14 Mw Technologies, Incorporated Detonation/deflagration precursor detection of gases, vapors, aerosols, and mixtures thereof
JP2000035215A (en) * 1998-07-16 2000-02-02 Tadao Kurata Combustion method
JP3080306B2 (en) * 1998-07-29 2000-08-28 忠男 倉田 Combustion equipment
DE19846039A1 (en) * 1998-10-06 2000-04-27 Friese Klaus Christian Low temperature oxidative pre-treatment of laboratory samples for trace element analysis involves converting an oxidizable material to ash at a specified temperature by contacting it with a condensed reactive gas
DE102007011021B8 (en) * 2006-08-01 2013-03-28 Analytik Jena Ag Method for analyzing gaseous samples
JP2011033576A (en) * 2009-08-05 2011-02-17 Kagoshima Univ Method of determining arsenic
CN102928551B (en) * 2012-10-26 2015-02-18 上海化工研究院 Rotary chemical substance combustibility sieving device
CN112834565B (en) * 2020-12-31 2022-10-14 西南科技大学 Miniature oxygen bomb for small calorimeter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1931989A (en) * 1931-05-25 1933-10-24 Davis Emergency Equipment Comp Air-purifying device
US2313028A (en) * 1939-05-04 1943-03-02 Siegmann Friedrich Process for the production of sodium and potassium hydride
US2468174A (en) * 1943-05-06 1949-04-26 Koppers Co Inc Apparatus for electriclaly transforming materials
US2396190A (en) * 1943-09-28 1946-03-05 Cities Service Oil Co Purification of submarine atmospheres
US3650929A (en) * 1963-08-16 1972-03-21 Licentia Gmbh Oxidizing method and apparatus
US3346341A (en) * 1965-06-28 1967-10-10 Beckman Instruments Inc Fragmentation inlet for gas chromatography and method of loading a sample thereinto
US3671195A (en) * 1968-08-19 1972-06-20 Int Plasma Corp Method and apparatus for ashing organic substance
US3682598A (en) * 1969-04-29 1972-08-08 Packard Instrument Co Inc Apparatus for the preparation of liquid form samples for radioactive isotope tracer studies

Also Published As

Publication number Publication date
DE2255774A1 (en) 1973-06-20
US3844716A (en) 1974-10-29
JPS4868297A (en) 1973-09-18
NL7216262A (en) 1973-06-05
FR2164214A5 (en) 1973-07-27
CA966197A (en) 1975-04-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee