Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples
Documented is an intercalibration (IC) exercise for both 210Po and 210Pb 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...
Published in: | Limnology and Oceanography: Methods |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
ASLO
2012
|
Subjects: | |
Online Access: | https://publications.hereon.de/id/34845 https://publications.hzg.de/id/34845 |
id |
fthzgzmk:oai:publications.hereon.de:34845 |
---|---|
record_format |
openpolar |
spelling |
fthzgzmk:oai:publications.hereon.de:34845 2023-06-11T04:14:51+02:00 Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples Church, T. Rigaud, S. Baskaran, M. Kumar, A. Friedrich, J. Masque, P. Puigcorbe, V. Kim, G. Radakovitch, O. Hong, G. Choi, H. Stewart, G. 2012 https://publications.hereon.de/id/34845 https://publications.hzg.de/id/34845 en eng ASLO http://dx.doi.org/10.4319/lom.2012.10.776 urn:issn:1541-5856 https://publications.hereon.de/id/34845 https://publications.hzg.de/id/34845 info:eu-repo/semantics/closedAccess issn:1541-5856 Church, T.; Rigaud, S.; Baskaran, M.; Kumar, A.; Friedrich, J.; Masque, P.; Puigcorbe, V.; Kim, G.; Radakovitch, O.; Hong, G.; Choi, H.; Stewart, G.: Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples. In: Limnology and Oceanography: Methods. Vol. 10 (2012) 10, 776 - 789. (DOI:10.4319/lom.2012.10.776) info:eu-repo/classification/ddc/551 info:eu-repo/semantics/article Zeitschrift Artikel 2012 fthzgzmk https://doi.org/10.4319/lom.2012.10.776 2023-05-28T23:24:26Z Documented is an intercalibration (IC) exercise for both 210Po and 210Pb 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 210Po and 210Pb in secular equilibrium to confirm spike calibrations. The 210Po 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 210Po versus 210Pb 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 210Po and 210Pb analyses in seawater samples. Article in Journal/Newspaper North Atlantic Hereon Publications (Helmholtz-Zentrum) Pacific Limnology and Oceanography: Methods 10 10 776 789 |
institution |
Open Polar |
collection |
Hereon Publications (Helmholtz-Zentrum) |
op_collection_id |
fthzgzmk |
language |
English |
topic |
info:eu-repo/classification/ddc/551 |
spellingShingle |
info:eu-repo/classification/ddc/551 Church, T. Rigaud, S. Baskaran, M. Kumar, A. Friedrich, J. Masque, P. Puigcorbe, V. Kim, G. Radakovitch, O. Hong, G. Choi, H. Stewart, G. Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
topic_facet |
info:eu-repo/classification/ddc/551 |
description |
Documented is an intercalibration (IC) exercise for both 210Po and 210Pb 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 210Po and 210Pb in secular equilibrium to confirm spike calibrations. The 210Po 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 210Po versus 210Pb 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 210Po and 210Pb analyses in seawater samples. |
format |
Article in Journal/Newspaper |
author |
Church, T. Rigaud, S. Baskaran, M. Kumar, A. Friedrich, J. Masque, P. Puigcorbe, V. Kim, G. Radakovitch, O. Hong, G. Choi, H. Stewart, G. |
author_facet |
Church, T. Rigaud, S. Baskaran, M. Kumar, A. Friedrich, J. Masque, P. Puigcorbe, V. Kim, G. Radakovitch, O. Hong, G. Choi, H. Stewart, G. |
author_sort |
Church, T. |
title |
Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
title_short |
Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
title_full |
Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
title_fullStr |
Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
title_full_unstemmed |
Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples |
title_sort |
intercalibration studies of 210po and 210pb in dissolved and particulate seawater samples |
publisher |
ASLO |
publishDate |
2012 |
url |
https://publications.hereon.de/id/34845 https://publications.hzg.de/id/34845 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
issn:1541-5856 Church, T.; Rigaud, S.; Baskaran, M.; Kumar, A.; Friedrich, J.; Masque, P.; Puigcorbe, V.; Kim, G.; Radakovitch, O.; Hong, G.; Choi, H.; Stewart, G.: Intercalibration studies of 210Po and 210Pb in dissolved and particulate seawater samples. In: Limnology and Oceanography: Methods. Vol. 10 (2012) 10, 776 - 789. (DOI:10.4319/lom.2012.10.776) |
op_relation |
http://dx.doi.org/10.4319/lom.2012.10.776 urn:issn:1541-5856 https://publications.hereon.de/id/34845 https://publications.hzg.de/id/34845 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1768371196400762880 |