Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples
Documented is an intercalibration (IC) exercise for both Po-210 and Pb-210 in seawater aliquots distributed between up to eight international laboratories that followed individual protocols. Dissolved and particulate samples were provided by GEOTRACES during two IC cruises at baseline stations in th...
Published in: | Limnology and Oceanography: Methods |
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Online Access: | https://hal.science/hal-01061553 https://doi.org/10.4319/lom.2012.10.776 |
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ftinraparis:oai:HAL:hal-01061553v1 2024-06-23T07:55:17+00:00 Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbe, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2012-10 https://hal.science/hal-01061553 https://doi.org/10.4319/lom.2012.10.776 en eng HAL CCSD Association for the Sciences of Limnology and Oceanography info:eu-repo/semantics/altIdentifier/doi/10.4319/lom.2012.10.776 hal-01061553 https://hal.science/hal-01061553 doi:10.4319/lom.2012.10.776 ISSN: 1541-5856 Limnology and Oceanography: Methods https://hal.science/hal-01061553 Limnology and Oceanography: Methods, 2012, 10, pp.776-789. ⟨10.4319/lom.2012.10.776⟩ [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2012 ftinraparis https://doi.org/10.4319/lom.2012.10.776 2024-06-11T15:07:49Z Documented is an intercalibration (IC) exercise for both Po-210 and Pb-210 in seawater aliquots distributed between up to eight international laboratories that followed individual protocols. Dissolved and particulate samples were provided by GEOTRACES during two IC cruises at baseline stations in the North Atlantic and North Pacific oceans. Included were surface and/or deep dissolved and particulate samples at each site, plus complete profiles analyzed by the laboratory of the lead author. An unspecified solid phase standard was also distributed with Po-210 and Pb-210 in secular equilibrium to confirm spike calibrations. The Po-210 activities reported n = 8) for the standard were very similar with a relative standard deviation (RSD) of 3.6% and mean value indistinguishable from the certified value, confirming accurate calibration of Po spikes. For seawater samples, the agreement was strongly dependent for both nuclides on the activity of the samples. The agreement was relatively good for dissolved seawater samples (RSD = 9% to 29%, n = 4), moderate for the particulate samples (RSD = 12% to 80%, n = 8), and poor for particulate dip blanks (RSD = 50% to 200%, n = 8). Noted is the higher apparent affinity of Po-210 versus Pb-210 for polysulphone filter material. Some lack of reproducibility between labs may have been caused by unspecified differences in individual lab protocols and calculations. A minimum sample activity of 0.1 dpm for both nuclides is recommended for an adequate reproducible sample activity. It is suggested that a consistent set of procedures and calculations be used to optimize future Po-210 and Pb-210 analyses in seawater samples. Article in Journal/Newspaper North Atlantic Institut National de la Recherche Agronomique: ProdINRA Pacific Limnology and Oceanography: Methods 10 10 776 789 |
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Open Polar |
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Institut National de la Recherche Agronomique: ProdINRA |
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ftinraparis |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
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[SDE.MCG]Environmental Sciences/Global Changes Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbe, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
Documented is an intercalibration (IC) exercise for both Po-210 and Pb-210 in seawater aliquots distributed between up to eight international laboratories that followed individual protocols. Dissolved and particulate samples were provided by GEOTRACES during two IC cruises at baseline stations in the North Atlantic and North Pacific oceans. Included were surface and/or deep dissolved and particulate samples at each site, plus complete profiles analyzed by the laboratory of the lead author. An unspecified solid phase standard was also distributed with Po-210 and Pb-210 in secular equilibrium to confirm spike calibrations. The Po-210 activities reported n = 8) for the standard were very similar with a relative standard deviation (RSD) of 3.6% and mean value indistinguishable from the certified value, confirming accurate calibration of Po spikes. For seawater samples, the agreement was strongly dependent for both nuclides on the activity of the samples. The agreement was relatively good for dissolved seawater samples (RSD = 9% to 29%, n = 4), moderate for the particulate samples (RSD = 12% to 80%, n = 8), and poor for particulate dip blanks (RSD = 50% to 200%, n = 8). Noted is the higher apparent affinity of Po-210 versus Pb-210 for polysulphone filter material. Some lack of reproducibility between labs may have been caused by unspecified differences in individual lab protocols and calculations. A minimum sample activity of 0.1 dpm for both nuclides is recommended for an adequate reproducible sample activity. It is suggested that a consistent set of procedures and calculations be used to optimize future Po-210 and Pb-210 analyses in seawater samples. |
author2 |
Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbe, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian |
author_facet |
Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbe, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian |
author_sort |
Church, Thomas |
title |
Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
title_short |
Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
title_full |
Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
title_fullStr |
Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
title_full_unstemmed |
Intercalibration studies of Po-210 and Pb-210 in dissolved and particulate seawater samples |
title_sort |
intercalibration studies of po-210 and pb-210 in dissolved and particulate seawater samples |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-01061553 https://doi.org/10.4319/lom.2012.10.776 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1541-5856 Limnology and Oceanography: Methods https://hal.science/hal-01061553 Limnology and Oceanography: Methods, 2012, 10, pp.776-789. ⟨10.4319/lom.2012.10.776⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.4319/lom.2012.10.776 hal-01061553 https://hal.science/hal-01061553 doi:10.4319/lom.2012.10.776 |
op_doi |
https://doi.org/10.4319/lom.2012.10.776 |
container_title |
Limnology and Oceanography: Methods |
container_volume |
10 |
container_issue |
10 |
container_start_page |
776 |
op_container_end_page |
789 |
_version_ |
1802647808765853696 |