The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS
Abstract The precise determination of radium‐226 ( 226 Ra) in environmental samples is challenging due to its low concentration. Seawater typically contains between 0.03 and 0.1 fg g −1 226 Ra. Thus, this work addresses the need for an easy and precise methodology for 226 Ra determination in seawate...
Published in: | Limnology and Oceanography: Methods |
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crwiley:10.1002/lom3.10428 2024-09-09T19:27:01+00:00 The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS Vieira, Lúcia H. Geibert, Walter Stimac, Ingrid Koehler, Dennis Rutgers van der Loeff, Michiel M. Helmholtz Association 2021 http://dx.doi.org/10.1002/lom3.10428 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10428 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lom3.10428 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10428 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography: Methods volume 19, issue 5, page 356-367 ISSN 1541-5856 1541-5856 journal-article 2021 crwiley https://doi.org/10.1002/lom3.10428 2024-07-25T04:19:11Z Abstract The precise determination of radium‐226 ( 226 Ra) in environmental samples is challenging due to its low concentration. Seawater typically contains between 0.03 and 0.1 fg g −1 226 Ra. Thus, this work addresses the need for an easy and precise methodology for 226 Ra determination in seawater that may be applied routinely to a large number of samples. For this reason, a new analytical approach has been developed for the quantification of 226 Ra in seawater via inductively coupled plasma mass spectrometry (ICP‐MS). Analysis by single collector sector‐field ICP‐MS was shown to be convenient and reliable for this purpose once potential molecular interferences were excluded by a combination of chemical separation and intermediate mass resolution analysis. The proposed method allows purification of Ra from the sample matrix based on preconcentration by MnO 2 precipitation, followed by two‐column separation using a cation exchange resin and an extraction chromatographic resin. The method can be applied to acidified and unacidified seawater samples. The recovery efficiency for Ra ranged between 90% and 99.8%, with precision of 5%, accuracy of 95.7% to 99.9%, and a detection limit of 0.033 fg g −1 (referring to the original concentration of seawater). The method has been applied to measure 226 Ra concentrations from the North Sea and validated by analyzing samples from the central Arctic (GEOTRACES GN04). Samples from a crossover station (from GEOTRACES GN04 and GEOTRACES GN01 research cruises) were analyzed using alternative methods, and our results are in good agreement with published values. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Limnology and Oceanography: Methods 19 5 356 367 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The precise determination of radium‐226 ( 226 Ra) in environmental samples is challenging due to its low concentration. Seawater typically contains between 0.03 and 0.1 fg g −1 226 Ra. Thus, this work addresses the need for an easy and precise methodology for 226 Ra determination in seawater that may be applied routinely to a large number of samples. For this reason, a new analytical approach has been developed for the quantification of 226 Ra in seawater via inductively coupled plasma mass spectrometry (ICP‐MS). Analysis by single collector sector‐field ICP‐MS was shown to be convenient and reliable for this purpose once potential molecular interferences were excluded by a combination of chemical separation and intermediate mass resolution analysis. The proposed method allows purification of Ra from the sample matrix based on preconcentration by MnO 2 precipitation, followed by two‐column separation using a cation exchange resin and an extraction chromatographic resin. The method can be applied to acidified and unacidified seawater samples. The recovery efficiency for Ra ranged between 90% and 99.8%, with precision of 5%, accuracy of 95.7% to 99.9%, and a detection limit of 0.033 fg g −1 (referring to the original concentration of seawater). The method has been applied to measure 226 Ra concentrations from the North Sea and validated by analyzing samples from the central Arctic (GEOTRACES GN04). Samples from a crossover station (from GEOTRACES GN04 and GEOTRACES GN01 research cruises) were analyzed using alternative methods, and our results are in good agreement with published values. |
author2 |
Helmholtz Association |
format |
Article in Journal/Newspaper |
author |
Vieira, Lúcia H. Geibert, Walter Stimac, Ingrid Koehler, Dennis Rutgers van der Loeff, Michiel M. |
spellingShingle |
Vieira, Lúcia H. Geibert, Walter Stimac, Ingrid Koehler, Dennis Rutgers van der Loeff, Michiel M. The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
author_facet |
Vieira, Lúcia H. Geibert, Walter Stimac, Ingrid Koehler, Dennis Rutgers van der Loeff, Michiel M. |
author_sort |
Vieira, Lúcia H. |
title |
The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
title_short |
The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
title_full |
The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
title_fullStr |
The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
title_full_unstemmed |
The analysis of 226 Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS |
title_sort |
analysis of 226 ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field icp‐ms |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/lom3.10428 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10428 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lom3.10428 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lom3.10428 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Limnology and Oceanography: Methods volume 19, issue 5, page 356-367 ISSN 1541-5856 1541-5856 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lom3.10428 |
container_title |
Limnology and Oceanography: Methods |
container_volume |
19 |
container_issue |
5 |
container_start_page |
356 |
op_container_end_page |
367 |
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1809896529741217792 |