Naslov
INTERCOMPARISON OF LOW-LEVEL TRITIUM AND RADIOCARBON MEASUREMENTS IN ENVIRONMENTAL SAMPLES

Autori
Krajcar Bronić, Ines ; Todorović, Nataša ; Nikolov, Jovana ; Barešić, Jadranka

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

Izvornik
RAD2012 - The First International Conference on Radiation and Dosimetry in Various Fields of Research - Proceedings / Ristić, Goran - Niš : University of Niš, 2012, 279-282

ISBN
978-86-6125-063-7

Skup
RAD2012 - The First International Conference on Radiation and Dosimetry in Various Fields of Research

Mjesto i datum
Niš, Srbija, 25.04.2012. - 27.04.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
tritium; 14C; intercomparison

Sažetak
Laboratory for Measurements of Low-level Radioactivities, Ruđer Bošković Institute (RBI) from Zagreb, Croatia, and Laboratory for Nuclear Physics, Department of Physics of the University of Novi Sad (UNS), Serbia, have started recently inter-laboratory comparisons of tritium (3H) and radiocarbon (14C) activities in various environmental samples. Both laboratories have the same type of detector, ultra low-level liquid scintillation counter (LSC) Quantulus 1220 (PerkinElmer Life Sciences). In the RBI laboratory water samples for 3H measurements are enriched by electrolysis, mixed with a scintillation cocktail and then measured by LSC. The lowest detection limit (LDL) of this method is 0.5 TU (TU = Tritium Unit, 1 TU = 0.118 Bq/L). At UNS, tritium concentration is measured either directly after mixing with the scintillation cocktail or by using an automatic Sample Oxidizer method. Also, several water samples enriched for tritium at RBI have been measured for comparison purposes at UNS. For radiocarbon measurement, the automatic Sample Oxidizer method has been used for sample preparation at UNS. In the RBI laboratory, samples are first pre-treated chemically by a standard acid-alkali-acid method, combusted to CO2 in a stream of pure oxygen and then the benzene is synthesized. This paper presents results of intercomparison of different methods for tritium (3H) measurements in water and for radiocarbon (14C) measurements in environmental samples between the two laboratories. The work was performed within the Bilateral scientific project between Croatia and Serbia.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Geologija, Kemija

POVEZANOST RADA