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Organically bound tritium analysis in environmental samples

Organically bound tritium analysis in environmental samples
Organically bound tritium analysis in environmental samples
Many methods allow analysing the various forms of tritium in environmental samples; however, there are no published standard methods for measuring organically bound tritium (OBT). Furthermore, there are no certified reference materials of OBT for environmental samples. In environmental samples (plants and animals), the measurement of the various tritium fractions requires extraction of the free water, often through freeze drying processes. Combustion of the dry sample is then carried out to recover organically bound tritium in the combustion water. By measuring these water fractions, the tissue-free water tritium (TFWT) and the OBT concentration can be assessed. However, these techniques are tricky and sometimes not available in all monitoring labs. Indeed, most of them measure only the TFWT fraction in food samples, such as wine or milk. Researches to promote the use of validated procedures are on-going in several countries. However, for almost all comparison exercise organisers it is difficult on a yearly basis to provide the samples and to realise the statistical treatment of the results. Therefore, to improve OBT analytical skills, an international task group devoted to the improvement of OBT analytical procedures was created to overcome these limitations. For the first exercise about 20 labs from 8 countries were registered. The samples, specially-prepared potatoes, were provided in March 2013 to each participant. Technical information and results from this first exercise are discussed here for all the labs which have realised the five replicates necessary to allow a reliable statistical treatment. From this work an optimised procedure can start to be developed to deal with OBT analysis and will guide subsequent planned OBT trials by the international group.
1536-1055
250-253
Baglan, N.
1af409ea-c4a2-44ca-880a-83dd6fc4ac72
Kim, S.B.
aff7760d-1548-49da-9e0c-b67a92eb02fd
Cossonnet, C.
13ae0fa5-3018-4547-87ad-52c9c2fc2098
Croudace, I.W.
24deb068-d096-485e-8a23-a32b7a68afaf
Fournier, M.
8c77c58d-dd74-45f8-bd9c-92dd8f658b52
Galeriu, D.
80e55f47-15ad-4d77-a789-92f3cd0af81c
Warwick, P.E.
f2675d83-eee2-40c5-b53d-fbe437f401ef
Momoshima, N.
9affa80a-93a5-4066-bd38-900642d5880d
Ansoborlo, E.
54d99dc3-8b83-4453-9431-6dad8eb7a27e
Baglan, N.
1af409ea-c4a2-44ca-880a-83dd6fc4ac72
Kim, S.B.
aff7760d-1548-49da-9e0c-b67a92eb02fd
Cossonnet, C.
13ae0fa5-3018-4547-87ad-52c9c2fc2098
Croudace, I.W.
24deb068-d096-485e-8a23-a32b7a68afaf
Fournier, M.
8c77c58d-dd74-45f8-bd9c-92dd8f658b52
Galeriu, D.
80e55f47-15ad-4d77-a789-92f3cd0af81c
Warwick, P.E.
f2675d83-eee2-40c5-b53d-fbe437f401ef
Momoshima, N.
9affa80a-93a5-4066-bd38-900642d5880d
Ansoborlo, E.
54d99dc3-8b83-4453-9431-6dad8eb7a27e

Baglan, N., Kim, S.B., Cossonnet, C., Croudace, I.W., Fournier, M., Galeriu, D., Warwick, P.E., Momoshima, N. and Ansoborlo, E. (2015) Organically bound tritium analysis in environmental samples. Fusion Science and Technology, 67 (2), 250-253. (doi:10.13182/FST14-T3).

Record type: Article

Abstract

Many methods allow analysing the various forms of tritium in environmental samples; however, there are no published standard methods for measuring organically bound tritium (OBT). Furthermore, there are no certified reference materials of OBT for environmental samples. In environmental samples (plants and animals), the measurement of the various tritium fractions requires extraction of the free water, often through freeze drying processes. Combustion of the dry sample is then carried out to recover organically bound tritium in the combustion water. By measuring these water fractions, the tissue-free water tritium (TFWT) and the OBT concentration can be assessed. However, these techniques are tricky and sometimes not available in all monitoring labs. Indeed, most of them measure only the TFWT fraction in food samples, such as wine or milk. Researches to promote the use of validated procedures are on-going in several countries. However, for almost all comparison exercise organisers it is difficult on a yearly basis to provide the samples and to realise the statistical treatment of the results. Therefore, to improve OBT analytical skills, an international task group devoted to the improvement of OBT analytical procedures was created to overcome these limitations. For the first exercise about 20 labs from 8 countries were registered. The samples, specially-prepared potatoes, were provided in March 2013 to each participant. Technical information and results from this first exercise are discussed here for all the labs which have realised the five replicates necessary to allow a reliable statistical treatment. From this work an optimised procedure can start to be developed to deal with OBT analysis and will guide subsequent planned OBT trials by the international group.

Full text not available from this repository.

More information

Accepted/In Press date: 21 October 2013
e-pub ahead of print date: March 2015
Published date: March 2015
Organisations: Geochemistry

Identifiers

Local EPrints ID: 375968
URI: http://eprints.soton.ac.uk/id/eprint/375968
ISSN: 1536-1055
PURE UUID: 5adb2259-cbf9-4cbb-b18f-d2cc347e946b

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Date deposited: 10 Apr 2015 14:29
Last modified: 03 Dec 2018 17:32

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Contributors

Author: N. Baglan
Author: S.B. Kim
Author: C. Cossonnet
Author: I.W. Croudace
Author: M. Fournier
Author: D. Galeriu
Author: P.E. Warwick
Author: N. Momoshima
Author: E. Ansoborlo

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