A method for the determination of low-level organic-bound tritium activities in environmental samples

Critical comparison of radiometric and mass spectrometric methods for the determination of radionuclides in environmental, biological and nuclear waste samples

“…The tritium concentration in environmental samples is normally very low (< 1 mBq/ml), the LSC is therefore not sensitive enough for the directly measurement, an electrolytic method is therefore often applied to enrich tritium from water [121], the enrichment factor of 30-100 can easily be obtained for 100-500 ml water. For the determination of tritium in solid samples, a combustion method is used to convert tritium to THO, which subsequently is measured by LSC [120][121][122].…”

Métrologie du tritium dans différentes matrices : cas du tritium organiquement lié (TOL)

“…Cette fraction est extraite par combustion dans un four tubulaire de diamètre suffisant pour le traitement d'échantillons de masse élevée (jusqu'à 40 g) afin de récupérer la masse d'eau de combustion nécessaire à une mesure optimale par scintillation liquide (Pointurier et al, 2004 ;Baglan et al, 2005). Une photo du four utilisé est présentée en figure 2.…”

“…La technique de référence utilisée couramment en routine pour l'analyse du tritium est la scintillation liquide (Theodorsson, 1999 ;Cassette, 2004 ;Pointurier et al, 2004) permettant de mesurer des concentrations de l'ordre de quelques Bq.L -1 pour les compteurs bas bruit de fond.…”

Organically bound tritium (OBT) behaviour and analysis: outcomes of the seminar held in Balaruc-les-Bains in May 2012

“…OBT/HTO ratios in terrestrial plants and food items are often substantially greater than one, even far away from local tritium sources: for samples representative of "background" environmental conditions, the mean OBT/HTO value is close to 2 (Pointurier et al, 2004;Baglan et al, 2005), with measured values sometimes up to 3 or 4 (Jean-Baptiste et al, 2011). This tritium enrichment has often been attributed to soil moisture with presumably lower tritium content than atmospheric water vapour.…”