Pretražite po imenu i prezimenu autora, mentora, urednika, prevoditelja

Napredna pretraga

Pregled bibliografske jedinice broj: 2614

Brza metoda za određivanje radioaktivnog stroncija u prirodnim uzorcima = Rapid method for the radioactive strontium determlnation in natural samples


Grahek, Zeljko; Košutic, Katarina; Lulic, Stipe
Brza metoda za određivanje radioaktivnog stroncija u prirodnim uzorcima = Rapid method for the radioactive strontium determlnation in natural samples // Zbornik radova Treceg simpozija Hrvatskoga društva za zaštitu od zracenja = Proceedings of the Symposium of the Croatian Radiation Protection Association / Kubelka, Dragan ; Kovač, Jadranka (ur.).
Zagreb: Hrvatsko društvo za zaštitu od zračenja, 1996. str. 317-322 (predavanje, nije recenziran, cjeloviti rad (in extenso), znanstveni)


CROSBI ID: 2614 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Brza metoda za određivanje radioaktivnog stroncija u prirodnim uzorcima = Rapid method for the radioactive strontium determlnation in natural samples
(Rapid method for the radioactive strontium determlnation in natural samples)

Autori
Grahek, Zeljko ; Košutic, Katarina ; Lulic, Stipe

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Zbornik radova Treceg simpozija Hrvatskoga društva za zaštitu od zracenja = Proceedings of the Symposium of the Croatian Radiation Protection Association / Kubelka, Dragan ; Kovač, Jadranka - Zagreb : Hrvatsko društvo za zaštitu od zračenja, 1996, 317-322

Skup
3. simpozij Hrvatskoga društva za zaštitu od zracenja

Mjesto i datum
Zagreb, Hrvatska, 20-22.11.1996

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Sr-90; separacija; ionski izmjenivač; prirodni uzorci
(Sr-90; separation; ionic exchanger; natural samples)

Sažetak
Radioactive strontium isotopes belong to the group of isotopes that are very dangerous for human health. Therefore radioactive strontium is regularly determined in natural samples. When determining strontium isotopes in natural samples, it is necessary to isolate strontium from the sample because strontium isotopes are pure ß-emitters. As natural samples contain much more calcium and sodium than strontium it is necessary to isolate a small quantity of strontium from large sample with simultaneous separation of calcium and other interfering elements. For this purpose an elegant method based on ion exchange chromatography has been developed. Namely, examinations with model system have shown that strontium may be separated from calcium on the column filled with anion exchanger and the mixture of the methanol and nitric acid as eluent. It was also shown that yttrium does not separated from strontium but elutes almost simultaneously with it. Yttrium may be separated from strontium on the column filled with cation exchanger DOWEX 5Ox8 and nitric acid as eluent. According to the above examinations, the procedure of isolation of strontium and yttrium from natural sample has been created (on assumption that ?90Sr and ?90Y in secular equilibrium in sample). Strontium and yttrium have been isolated from natural sample (standard IAEA A-7) on the column fille?d ?with the exchanger AMBERLITE CG-400 and the mixture of methanol and nitric acid as eluent. Strontium and yttrium have been separated on the column with cation exchanger. 90lSr has been determined through 90Y by counting the solid yttrium oxalate immediately upon isolation and separation from strontium. 90Sr has also been deterimined by counting 90Sr-?90Y in secular equilibrium after 15 days. The obtained results of determination of 90Sr through 90Y and through secular equilibrium 90Sr-90Y correspond to the declared values of standard.

Izvorni jezik
Hrvatski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
00981509

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Željko Grahek (autor)

Citiraj ovu publikaciju

Grahek, Zeljko; Košutic, Katarina; Lulic, Stipe
Brza metoda za određivanje radioaktivnog stroncija u prirodnim uzorcima = Rapid method for the radioactive strontium determlnation in natural samples // Zbornik radova Treceg simpozija Hrvatskoga društva za zaštitu od zracenja = Proceedings of the Symposium of the Croatian Radiation Protection Association / Kubelka, Dragan ; Kovač, Jadranka (ur.).
Zagreb: Hrvatsko društvo za zaštitu od zračenja, 1996. str. 317-322 (predavanje, nije recenziran, cjeloviti rad (in extenso), znanstveni)
Grahek, Z., Košutic, K. & Lulic, S. (1996) Brza metoda za određivanje radioaktivnog stroncija u prirodnim uzorcima = Rapid method for the radioactive strontium determlnation in natural samples. U: Kubelka, D. & Kovač, J. (ur.)Zbornik radova Treceg simpozija Hrvatskoga društva za zaštitu od zracenja = Proceedings of the Symposium of the Croatian Radiation Protection Association.
@article{article, year = {1996}, pages = {317-322}, keywords = {Sr-90, separation, ionic exchanger, natural samples}, title = {Rapid method for the radioactive strontium determlnation in natural samples}, keyword = {Sr-90, separation, ionic exchanger, natural samples}, publisher = {Hrvatsko dru\v{s}tvo za za\v{s}titu od zra\v{c}enja}, publisherplace = {Zagreb, Hrvatska} }