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The Scintillation Counting of Calcium-45; Comptage du Calcium-45 au Moyen d'un Scintillateur; Izmerenie aktivnosti Kal'tsiya-45 stsintillyatsionnym metodom; Determinacion del Calcio-45 Mediante Contadores de Centelleo

Conference:

Abstract

A review is made of some of the methods for the assay of {sup 45}Ca in biological materials. Experience gained from the assay of {sup 45}Ca in such materials, using a liquid scintillation technique previously published by the authors, is reported. Difficulties were found with certain samples because of the presence of relatively large amounts of iron. The quenching of the scintillator due to this iron, and methods for overcoming it are discussed. Results are given of the use of external gamma-ray sources as standards and as a means of estimating quenching effects in certain samples. Though not entirely satisfactory for the measurement of quenching, their use as a standard for checking counter performance is recommended. A comparison is given of the methods, including liquid and plastic scintillation counting of {sup 45}Ca covering the following aspects: (a) efficiency, (b) background, (c) ease and speed of sample preparation, (d) use of standards and reproducibility, and (e) stable calcium capacity. Recommendations are made as to which technique is most suitable under given circumstances. (author) [French] Les auteurs examinent plusieurs methodes de dosage de {sup 45}Ca contenu dans des substances biologiques. Ils decrivent les resultats qu'ils ont obtenus precedemment en analysant, au' moyen  More>>
Authors:
Carr, T. E.F.; Parsons, B. J. [1] 
  1. Medical Research Council, Radiobiological Research Unit, Harwell (United Kingdom)
Publication Date:
Oct 15, 1965
Product Type:
Conference
Report Number:
IAEA-SM-61/2
Resource Relation:
Conference: Symposium on Radioisotope Sample Measurement Techniques in Medicine and Biology, Vienna (Austria), 24-28 May 1965; Other Information: 32 refs., 2 tabs., 2 figs.; Related Information: In: Radioisotope Sample Measurement Techniques in Medicine and Biology. Proceedings of the Symposium on Radioisotope Sample Measurement Techniques| 741 p.
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 60 APPLIED LIFE SCIENCES; BIOLOGICAL MATERIALS; CALCIUM; CALCIUM 45; EFFICIENCY; GAMMA SOURCES; IRON; LIQUIDS; PERFORMANCE; PLASTIC SCINTILLATION DETECTORS; QUENCHING; RECOMMENDATIONS; SAMPLE PREPARATION; SCINTILLATION COUNTING; SCINTILLATIONS; STANDARDS
OSTI ID:
22131298
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2496086422
Submitting Site:
INIS
Size:
page(s) 457-468
Announcement Date:
Sep 19, 2013

Conference:

Citation Formats

Carr, T. E.F., and Parsons, B. J. The Scintillation Counting of Calcium-45; Comptage du Calcium-45 au Moyen d'un Scintillateur; Izmerenie aktivnosti Kal'tsiya-45 stsintillyatsionnym metodom; Determinacion del Calcio-45 Mediante Contadores de Centelleo. IAEA: N. p., 1965. Web.
Carr, T. E.F., & Parsons, B. J. The Scintillation Counting of Calcium-45; Comptage du Calcium-45 au Moyen d'un Scintillateur; Izmerenie aktivnosti Kal'tsiya-45 stsintillyatsionnym metodom; Determinacion del Calcio-45 Mediante Contadores de Centelleo. IAEA.
Carr, T. E.F., and Parsons, B. J. 1965. "The Scintillation Counting of Calcium-45; Comptage du Calcium-45 au Moyen d'un Scintillateur; Izmerenie aktivnosti Kal'tsiya-45 stsintillyatsionnym metodom; Determinacion del Calcio-45 Mediante Contadores de Centelleo." IAEA.
@misc{etde_22131298,
title = {The Scintillation Counting of Calcium-45; Comptage du Calcium-45 au Moyen d'un Scintillateur; Izmerenie aktivnosti Kal'tsiya-45 stsintillyatsionnym metodom; Determinacion del Calcio-45 Mediante Contadores de Centelleo}
author = {Carr, T. E.F., and Parsons, B. J.}
abstractNote = {A review is made of some of the methods for the assay of {sup 45}Ca in biological materials. Experience gained from the assay of {sup 45}Ca in such materials, using a liquid scintillation technique previously published by the authors, is reported. Difficulties were found with certain samples because of the presence of relatively large amounts of iron. The quenching of the scintillator due to this iron, and methods for overcoming it are discussed. Results are given of the use of external gamma-ray sources as standards and as a means of estimating quenching effects in certain samples. Though not entirely satisfactory for the measurement of quenching, their use as a standard for checking counter performance is recommended. A comparison is given of the methods, including liquid and plastic scintillation counting of {sup 45}Ca covering the following aspects: (a) efficiency, (b) background, (c) ease and speed of sample preparation, (d) use of standards and reproducibility, and (e) stable calcium capacity. Recommendations are made as to which technique is most suitable under given circumstances. (author) [French] Les auteurs examinent plusieurs methodes de dosage de {sup 45}Ca contenu dans des substances biologiques. Ils decrivent les resultats qu'ils ont obtenus precedemment en analysant, au' moyen d'un scintillateur liquide, le {sup 45}Ca contenu dans ces substances. Certains echantillons ont cause des difficultes, car ils contenaient des quantites de fer assez importantes. Le memoire fait etat de l'extinction du scintillateur provoquee par ces quantites de fer et discute les methodes qui permettent d'y remedier. Les auteurs donnent les resultats obtenus avec des sources gamma exterieures utilisees comme etalons qui permettent par ailleurs d'evaluer les effets d'extinction dans certains echantillons. Bien que ces sources ne soient pas entierement satisfaisantes pour mesurer l'extinction, ils recommandent de les utiliser comme etalons pour controler la performance du compteur. Les auteurs comparent les diverses methodes de comptage de {sup 45}Ca notamment avec scintillateurs liquides ou en matiere plastique, sous les aspects suivants: a) efficacite, b) bruit de fond, c) facilite et vitesse de preparation des echantillons, d) emploi d'etalons et reproductibilite, et e) capacite en calcium stable. Les auteurs formulent des recommandations touchant la technique qu'ils considerent comme la plus appropriee dans des conditions donnees. (author) [Spanish] Los autores pasan revista a algunos metodos de determinacion del calcio-45 en sustancias biologicas. Se describe la experiencia adquirida en la determinacion de calcio-45 en dichas sustancias aplicando una tecnica de recuento con centelleador laquido ya dada a conocer por los autores. Ciertas muestras suscitaron dificultades debidas a la presencia de cantidades relativamente grandes de hierro. Se estudia la extincion provocada por este ultimo elemento, asf como metodos para superar esta dificultad. Se exponen los resultados del empleo de fuentes gamma internas como patrones y como medio de evaluar los efectos de extincion en ciertas muestras. Aunque no son enteramente satisfactorias para medir la extincion, se recomienda su uso como patrones para comprobar el correcto funcionamiento del contador. Se comparan los resultados de esos metodos, incluidos los de determinacion del {sup 45}Ca por recuento con centelleador liquido y plastico, con respecto a los siguientes puntos: a) rendimiento, b) actividad de fondo, c) facilidad y rapidez de preparacion de muestras, d) empleo de patrones y reproductibilidad, y e) influencia del calcio estable. Se formulan recomendaciones sobre la tecnica mas apropiada segun las circunstancias de cada caso. (author) [Russian] Daetsja obzor nekotoryh metodov ocenki kal'cija-45 v biologicheskih materialah. Soobshhaetsja ob opyte, nakoplennom v processe ocenki kal'cija-45, s primeneniem metoda scheta zhidkostnym scintilljatorom, o kotorom avtory soobshhali ranee. Pri ocenke nekotoryh obrazcov voznikali trudnosti vvidu prisutstvija sravnitel'no bol'shih kolichestv zheleza. Obsuzhdajutsja problemy oslablenija scintilljatora vvidu prisutstvija zheleza i metody preodolenija takogo oslablenija. Privodjatsja rezul'taty ispol'zovanija vneshnih istochnikov gamma-izluchenija v kachestve standartov i sredstv ocenki jeffektov oslablenija v nekotoryh obrazcah. Rekomenduetsja primenjat' ih v kachestve standartov dlja proverki harakteristiki schetchika, hotja oni ne polnost'ju udovletvorjajut trebovanijam pri izmerenii stepeni oslablenija. Provoditsja sravnenie metodov, v tom chisle metodov scheta kal'cija-45 zhidkim i plasticheskim scintilljatorami, s ohvatom sledujushhih aspektov: a) jeffektivnost'; b) fon; v) legkost' i skorost' podgotovki obrazcov; g) primenenie standartov i vosproizvodimost'; d) emkost' ustojchivogo kal'cija. Dajutsja rekomendacii otnositel'no stepeni prigodnosti jetih metodov pri zadannyh obstojatel'stvah. (author)}
place = {IAEA}
year = {1965}
month = {Oct}
}