Optimisation of liquid scintillation counting conditions for rapid tritium determination in aqueous samples

Ll Pujol, J. A. Sanchez-Cabeza

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31 Citations (Scopus)

Abstract

Several studies were carried out to optimise rapid tritium analysis in fresh waters by ultra-low background liquid scintillation. These included the optimisation of (i) sample/scintillant ratio, (2) pulse shape analysis, and (3) pulse-amplitude comparator, and studies concerning (1) the combination scintillant/vial and (2) the effect of chemiluminescence. The proposed method involves the mixing of 8 ml sample with 12 ml scintillation cocktail Ultima Gold AB in Zinsser low diffusion vials. These are stored during one day before counting in order to reduce chemiluminescence. The minimum detectable activity achieved was 2.2 Bq·l-1 for a total counting time of 360 minutes. In order to test the method, tritium was determined in Ebro river samples.
Original languageEnglish
Pages (from-to)391-398
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume242
Issue number2
DOIs
Publication statusPublished - 1 Jan 1999

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