Naslov
Determination of low-level radiostrontium activities in natural samples

Autori
Košutić, Katarina ; Grahek, Željko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts of the 10th International Congress of The International Radiation Protection Association / K - Hiroshima : International Radiation Protection Association (IRPA), 2000, 111-111

Skup
Harmonization of radiation Human life and ecosystem

Mjesto i datum
Hiroshima, Japan, 14.05.2000. - 19.05.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
radiostrontium; low-level activities; natural samples

Sažetak
Strontium isotope 90Sr belongs to the group of isotopes, which are very dangerous for human health. Therefore 90Sr being determined usually in natural samples as soil, drinking water, etc. When determining 90Sr in natural samples it is necessary to isolate 90Sr from sample because 90Sr is pure beta emitter. As these samples contains much more other elements (sodium, calcium, iron, etc.) than strontium, it is necessary to isolate a small quantity of strontium from sample with simultaneous separation of other interfering elements. For this purpose an elegant method based on chromatographic techniques has been developed. Radioactive strontium is isolated from natural samples and separated from calcium, sodium, potassium, caesium, iron and some other elements on chromatographic columns filled with strong base anion exchanger and Sr.spec resin. Application of this technique eliminates most of the problems with regard to chemical isolation that are present in the standard procedure. On the other hand, liquid scintillation spectrometers with a very low level background (TRI CARB 2770 TR/SL, QUANTULUS) allowing the determination of low level activities. A combination of these techniques enables the creation of relatively simple and rapid procedures for the determination of low level activities of radioactive strontium. Therefore the whole determination procedures will be presented. Particularly, a possibility of determination very low level activities by combination of Cherenkov counting and classical scintillation spectrometry will be considered.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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