Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples
Documented is an intercalibration (IC) exercise for both 210 Po and 210 Pb 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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crwiley:10.4319/lom.2012.10.776 2024-09-15T18:23:49+00:00 Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbé, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian 2012 http://dx.doi.org/10.4319/lom.2012.10.776 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flom.2012.10.776 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lom.2012.10.776 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography: Methods volume 10, issue 10, page 776-789 ISSN 1541-5856 1541-5856 journal-article 2012 crwiley https://doi.org/10.4319/lom.2012.10.776 2024-07-25T04:23:43Z Documented is an intercalibration (IC) exercise for both 210 Po and 210 Pb 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 210 Po and 210 Pb in secular equilibrium to confirm spike calibrations. The 210 Po 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 210 Po versus 210 Pb 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 210 Po and 210 Pb analyses in seawater samples. Article in Journal/Newspaper North Atlantic Wiley Online Library Limnology and Oceanography: Methods 10 10 776 789 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Documented is an intercalibration (IC) exercise for both 210 Po and 210 Pb 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 210 Po and 210 Pb in secular equilibrium to confirm spike calibrations. The 210 Po 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 210 Po versus 210 Pb 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 210 Po and 210 Pb analyses in seawater samples. |
format |
Article in Journal/Newspaper |
author |
Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbé, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian |
spellingShingle |
Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbé, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
author_facet |
Church, Thomas Rigaud, Sylvain Baskaran, Mark Kumar, Anupam Friedrich, Jana Masque, Pere Puigcorbé, Viena Kim, Guebuem Radakovitch, Olivier Hong, Gi Choi, Hiu Stewart, Gillian |
author_sort |
Church, Thomas |
title |
Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
title_short |
Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
title_full |
Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
title_fullStr |
Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
title_full_unstemmed |
Intercalibration studies of 210 Po and 210 Pb in dissolved and particulate seawater samples |
title_sort |
intercalibration studies of 210 po and 210 pb in dissolved and particulate seawater samples |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.4319/lom.2012.10.776 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flom.2012.10.776 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lom.2012.10.776 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography: Methods volume 10, issue 10, page 776-789 ISSN 1541-5856 1541-5856 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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_ |
1810464094895996928 |