Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research
Thirteen laboratories from the USA and Europe participated in an intercomparison study of Mg/Ca and Sr/Ca measurements in foraminifera. The study included five planktonic species from surface sediments from different geographical regions and water depths. Each of the laboratories followed their own...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/115813/ http://www.agu.org/pubs/crossref/2004./2003GC000650.shtml https://doi.org/10.1029/2003GC000650 |
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ftnerc:oai:nora.nerc.ac.uk:115813 2023-05-15T18:00:59+02:00 Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research Rosenthal, Y. Perron-Cashman, S. Lear, C.H. Bard, E. Barker, S. Billups, K. Bryan, M. Delaney, M.L. deMenocal, P.B. Dwyer, G.S. Elderfield, H. German, C.R. Greaves, M. Lea, D.W. Marchitto, T.M. Pak, D.K. Paradis, G.L. Russell, A.D. Schneider, R.R. Scheiderich, K. Stott, L. Tachikawa, K. Tappa, E. Thunell, R. Wara, M. Weldeab, S. Wilson, P.A. 2004 http://nora.nerc.ac.uk/id/eprint/115813/ http://www.agu.org/pubs/crossref/2004./2003GC000650.shtml https://doi.org/10.1029/2003GC000650 unknown Rosenthal, Y.; Perron-Cashman, S.; Lear, C.H.; Bard, E.; Barker, S.; Billups, K.; Bryan, M.; Delaney, M.L.; deMenocal, P.B.; Dwyer, G.S.; Elderfield, H.; German, C.R.; Greaves, M.; Lea, D.W.; Marchitto, T.M.; Pak, D.K.; Paradis, G.L.; Russell, A.D.; Schneider, R.R.; Scheiderich, K.; Stott, L.; Tachikawa, K.; Tappa, E.; Thunell, R.; Wara, M.; Weldeab, S.; Wilson, P.A. 2004 Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research. Geochemistry, Geophysics, Geosystems (Online), 5 (4). Q04D09. https://doi.org/10.1029/2003GC000650 <https://doi.org/10.1029/2003GC000650> Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1029/2003GC000650 2023-02-04T19:34:21Z Thirteen laboratories from the USA and Europe participated in an intercomparison study of Mg/Ca and Sr/Ca measurements in foraminifera. The study included five planktonic species from surface sediments from different geographical regions and water depths. Each of the laboratories followed their own cleaning and analytical procedures and had no specific information about the samples. Analysis of solutions of known Mg/Ca and Sr/Ca ratios showed that the intralaboratory instrumental precision is better than 0.5% for both Mg/Ca and Sr/Ca measurements, regardless whether ICP-OES or ICP-MS is used. The interlaboratory precision on the analysis of standard solutions was about 1.5% and 0.9% for Mg/Ca and Sr/Ca measurements, respectively. These are equivalent to Mg/Ca-based temperature repeatability and reproducibility on the analysis of solutions of ±0.2°C and ±0.5°C, respectively. The analysis of foraminifera suggests an interlaboratory variance of about ±8% (%RSD) for Mg/Ca measurements, which translates to reproducibility of about ±2–3°C. The relatively large range in the reproducibility of foraminiferal analysis is primarily due to relatively poor intralaboratory repeatability (about ±1–2°C) and a bias (about 1°C) due to the application of different cleaning methods by different laboratories. Improving the consistency of cleaning methods among laboratories will, therefore, likely lead to better reproducibility. Even more importantly, the results of this study highlight the need for standards calibration among laboratories as a first step toward improving interlaboratory compatibility. Article in Journal/Newspaper Planktonic foraminifera Natural Environment Research Council: NERC Open Research Archive Geochemistry, Geophysics, Geosystems 5 4 n/a n/a |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
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description |
Thirteen laboratories from the USA and Europe participated in an intercomparison study of Mg/Ca and Sr/Ca measurements in foraminifera. The study included five planktonic species from surface sediments from different geographical regions and water depths. Each of the laboratories followed their own cleaning and analytical procedures and had no specific information about the samples. Analysis of solutions of known Mg/Ca and Sr/Ca ratios showed that the intralaboratory instrumental precision is better than 0.5% for both Mg/Ca and Sr/Ca measurements, regardless whether ICP-OES or ICP-MS is used. The interlaboratory precision on the analysis of standard solutions was about 1.5% and 0.9% for Mg/Ca and Sr/Ca measurements, respectively. These are equivalent to Mg/Ca-based temperature repeatability and reproducibility on the analysis of solutions of ±0.2°C and ±0.5°C, respectively. The analysis of foraminifera suggests an interlaboratory variance of about ±8% (%RSD) for Mg/Ca measurements, which translates to reproducibility of about ±2–3°C. The relatively large range in the reproducibility of foraminiferal analysis is primarily due to relatively poor intralaboratory repeatability (about ±1–2°C) and a bias (about 1°C) due to the application of different cleaning methods by different laboratories. Improving the consistency of cleaning methods among laboratories will, therefore, likely lead to better reproducibility. Even more importantly, the results of this study highlight the need for standards calibration among laboratories as a first step toward improving interlaboratory compatibility. |
format |
Article in Journal/Newspaper |
author |
Rosenthal, Y. Perron-Cashman, S. Lear, C.H. Bard, E. Barker, S. Billups, K. Bryan, M. Delaney, M.L. deMenocal, P.B. Dwyer, G.S. Elderfield, H. German, C.R. Greaves, M. Lea, D.W. Marchitto, T.M. Pak, D.K. Paradis, G.L. Russell, A.D. Schneider, R.R. Scheiderich, K. Stott, L. Tachikawa, K. Tappa, E. Thunell, R. Wara, M. Weldeab, S. Wilson, P.A. |
spellingShingle |
Rosenthal, Y. Perron-Cashman, S. Lear, C.H. Bard, E. Barker, S. Billups, K. Bryan, M. Delaney, M.L. deMenocal, P.B. Dwyer, G.S. Elderfield, H. German, C.R. Greaves, M. Lea, D.W. Marchitto, T.M. Pak, D.K. Paradis, G.L. Russell, A.D. Schneider, R.R. Scheiderich, K. Stott, L. Tachikawa, K. Tappa, E. Thunell, R. Wara, M. Weldeab, S. Wilson, P.A. Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
author_facet |
Rosenthal, Y. Perron-Cashman, S. Lear, C.H. Bard, E. Barker, S. Billups, K. Bryan, M. Delaney, M.L. deMenocal, P.B. Dwyer, G.S. Elderfield, H. German, C.R. Greaves, M. Lea, D.W. Marchitto, T.M. Pak, D.K. Paradis, G.L. Russell, A.D. Schneider, R.R. Scheiderich, K. Stott, L. Tachikawa, K. Tappa, E. Thunell, R. Wara, M. Weldeab, S. Wilson, P.A. |
author_sort |
Rosenthal, Y. |
title |
Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
title_short |
Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
title_full |
Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
title_fullStr |
Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
title_full_unstemmed |
Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research |
title_sort |
interlaboratory comparison study of mg/ca and sr/ca measurements in planktonic foraminifera for paleoceanographic research |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/115813/ http://www.agu.org/pubs/crossref/2004./2003GC000650.shtml https://doi.org/10.1029/2003GC000650 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
Rosenthal, Y.; Perron-Cashman, S.; Lear, C.H.; Bard, E.; Barker, S.; Billups, K.; Bryan, M.; Delaney, M.L.; deMenocal, P.B.; Dwyer, G.S.; Elderfield, H.; German, C.R.; Greaves, M.; Lea, D.W.; Marchitto, T.M.; Pak, D.K.; Paradis, G.L.; Russell, A.D.; Schneider, R.R.; Scheiderich, K.; Stott, L.; Tachikawa, K.; Tappa, E.; Thunell, R.; Wara, M.; Weldeab, S.; Wilson, P.A. 2004 Interlaboratory comparison study of Mg/Ca and Sr/Ca measurements in planktonic foraminifera for paleoceanographic research. Geochemistry, Geophysics, Geosystems (Online), 5 (4). Q04D09. https://doi.org/10.1029/2003GC000650 <https://doi.org/10.1029/2003GC000650> |
op_doi |
https://doi.org/10.1029/2003GC000650 |
container_title |
Geochemistry, Geophysics, Geosystems |
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5 |
container_issue |
4 |
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n/a |
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1766170278413467648 |