Quality control assurance of strontium-90 in foodstuffs by LSC.
Appl Radiat Isot
; 93: 29-32, 2014 Nov.
Article
in En
| MEDLINE
| ID: mdl-24560851
ABSTRACT
A method based on the separation of Sr-90 by extraction chromatography and beta determination by Liquid Scintillation Counting (LSC) technique was used for strontium analysis in food samples. The methodology consisted in prior sample treatment (drying and incineration) followed by radiochemical separation of Sr-90 by extraction chromatography, using the Sr-resin. The chemical yield was determined by gravimetric method, adding stable strontium to the matrix. Beta activity (Sr-90/Y-90) was determined using a low background liquid scintillation spectrometer (Tri-Carb 3170 TR/SL, Packard). The accuracy and the precision of the method, was performed previously through recovery trials with Sr-90 spiked samples, using the same type of matrices (milk, complete meals, meat and vegetables). A reference material (IAEA_321) was now used to measure the accuracy of the procedure. Participation in interlaboratory comparison exercises was also performed in order to establish an external control on the measurements and to ensure the adequacy of the method.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Scintillation Counting
/
Strontium Radioisotopes
/
Food Contamination, Radioactive
Type of study:
Evaluation_studies
Limits:
Humans
Language:
En
Journal:
Appl Radiat Isot
Journal subject:
MEDICINA NUCLEAR
/
SAUDE AMBIENTAL
Year:
2014
Document type:
Article