Naslov
Comparison of performances of various scintillation cocktails and vials for 3H activity determination by liquid scintillation counting

Autori
Krajcar Bronić, Ines ; Barešić, Jadranka ; Borković, Damir ; Sironić, Andreja

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

Izvornik
Book of Abstracts - RANC - 2nd International Conference on Radioanalytical and Nuclear Chemistry / - Budimpešta : Akadémiai Kiadó, 2019, 127-127

ISBN
978 963 454 369 5

Skup
RANC 2019 - 2nd International Conference on Radioanalytical and Nuclear Chemistry

Mjesto i datum
Budimpešta, Mađarska, 05.05.2019. - 10.05.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Recenziran

Ključne riječi
3H ; LSC ; scintillation cocktails ; vials

Sažetak
Determination of low-level tritium (3H) activity concentration in environmental water samples by liquid scintillation counting requires use of a scintillation cocktail mixed with a sample in an appropriate vial. Many of the scintillation cocktails currently in use contain chemical components harmful for biota. Currently, there are several scintillation cocktails that do not contain harmful substances available and it is expected that more will be on the market very soon. From the point of the measurement quality, it is required that the new scintillation cocktails have at least the same performance characteristics as the currently best cocktails used. We performed several performance tests of different scintillation cocktails for 3H activity concentration measurements by liquid scintillation counter LSC Quantulus 1220: Ultima Gold LLT, ProSafe LT+ (from Al container and from glass bottle) and GoldStar LT2 by Meridian Biotechnologies. Samples of 3H activity concentration in the range 0 to 600 Bq/L were prepared and counted by a standard laboratory procedures (sample:cocktail ratio 8:12 in HDPE vials, tritium window 25-253 channel) by each of the studied cocktail. The following parameters were compared: background count rate, counting efficiency, quenching parameter (SQP), detection limit (DL) and Figure of Merit (FOM). The performances of the UGLLT and GS cocktails were similar (efficiency 23%, SQP 777, DL 1.6 Bq/L, FOM ≈6300) and the best among the studied cocktails. In addition, several types of vials produced by 3 different producers were also tested by applying similar procedures as above. No significant differences were obtained among the tested vials. Acknowledgments We thank Meridian Technologies for providing samples of different scintillation cocktails and some vials.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

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