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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 (0.1-1nM). It also presents the first data of this kind. Iron is preconcentrated using a Nitriloacetic Acid Superflow...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.393.4908 2023-05-15T18:25:20+02:00 6 7 8 The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.4908 http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.4908 http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf text 2009 ftciteseerx 2016-01-08T02:21:49Z 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 (0.1-1nM). 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 57 Fe- 58 Fe double spike mass bias correction. Measurement precision (0.13‰, 2SD) allow resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from δ 57 Fe=-0.19 to +0.32‰). 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: ⎪Δ 57 Fe(plankton-seawater)⎪< 0.48‰. Text Southern Ocean Unknown Southern Ocean |
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ftciteseerx |
language |
English |
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 (0.1-1nM). 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 57 Fe- 58 Fe double spike mass bias correction. Measurement precision (0.13‰, 2SD) allow resolving small iron isotopic composition variations within the water column, in the Atlantic sector of the Southern Ocean (from δ 57 Fe=-0.19 to +0.32‰). 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: ⎪Δ 57 Fe(plankton-seawater)⎪< 0.48‰. |
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The Pennsylvania State University CiteSeerX Archives |
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2009 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.4908 http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf |
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Southern Ocean |
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Southern Ocean |
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Southern Ocean |
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Southern Ocean |
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http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.393.4908 http://hal.archives-ouvertes.fr/docs/00/39/91/11/PDF/HALComplet_texteet_Figure.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766206703224750080 |