Measurement of the isotopic composition of dissolved iron in the open ocean
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflo...
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2008
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Online Access: | https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/ |
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ftarchimer:oai:archimer.ifremer.fr:31374 2023-05-15T18:24:57+02:00 Measurement of the isotopic composition of dissolved iron in the open ocean Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. 2008-12 application/pdf https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00202/31374/29781.pdf doi:10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/ Copyright 2008 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-12 , Vol. 35 , N. L24610 , P. 1-5 MC ICP MS chelating resin southern ocean fractionation seawater earth separation accuracy pacific FE(III) text Publication info:eu-repo/semantics/article 2008 ftarchimer https://doi.org/10.1029/2008GL035841 2021-09-23T20:24:46Z This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in the Upper Circumpolar Deep Water is hypothesized to result from organic matter remineralization. Shallow samples suggest that, if occurring, an iron isotopic fractionation during iron uptake by phytoplankton is characterized by a fractionation factor, such as: vertical bar Delta Fe-57((plankton-seawater))vertical bar < 0.48 parts per thousand. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Pacific Southern Ocean Geophysical Research Letters 35 24 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
MC ICP MS chelating resin southern ocean fractionation seawater earth separation accuracy pacific FE(III) |
spellingShingle |
MC ICP MS chelating resin southern ocean fractionation seawater earth separation accuracy pacific FE(III) Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. Measurement of the isotopic composition of dissolved iron in the open ocean |
topic_facet |
MC ICP MS chelating resin southern ocean fractionation seawater earth separation accuracy pacific FE(III) |
description |
This work demonstrates for the first time the feasibility of the measurement of the isotopic composition of dissolved iron in seawater for a typical open ocean Fe concentration range (0.1-1 nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow resin and purified using an AG1x4 anion exchange resin. The isotopic ratios are measured with a MC-ICPMS Neptune, coupled with a desolvator (Aridus II), using a Fe-57-Fe-58 double spike mass bias correction. Measurement precision (0.13%, 2SD) allows resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from delta Fe-57 = -0.19 to +0.32 parts per thousand). Isotopically light iron found in the Upper Circumpolar Deep Water is hypothesized to result from organic matter remineralization. Shallow samples suggest that, if occurring, an iron isotopic fractionation during iron uptake by phytoplankton is characterized by a fractionation factor, such as: vertical bar Delta Fe-57((plankton-seawater))vertical bar < 0.48 parts per thousand. |
format |
Article in Journal/Newspaper |
author |
Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. |
author_facet |
Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, Geraldine Pradoux, C. Freydier, R. |
author_sort |
Lacan, F. |
title |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_short |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_full |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_fullStr |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_full_unstemmed |
Measurement of the isotopic composition of dissolved iron in the open ocean |
title_sort |
measurement of the isotopic composition of dissolved iron in the open ocean |
publisher |
Amer Geophysical Union |
publishDate |
2008 |
url |
https://archimer.ifremer.fr/doc/00202/31374/29781.pdf https://doi.org/10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/ |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2008-12 , Vol. 35 , N. L24610 , P. 1-5 |
op_relation |
https://archimer.ifremer.fr/doc/00202/31374/29781.pdf doi:10.1029/2008GL035841 https://archimer.ifremer.fr/doc/00202/31374/ |
op_rights |
Copyright 2008 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2008GL035841 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
24 |
_version_ |
1766206013145350144 |