Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples
Iron is an element of great interest due to its role in primary production and in oceanic carbon cycle regulation, such that past changes in iron deposition may have influenced oceanic sequestration of atmospheric CO2 on millennial time scales. The behavior of iron in biological and environmental co...
Published in: | J. Anal. At. Spectrom. |
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Language: | English |
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2012
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Online Access: | https://curis.ku.dk/portal/da/publications/determination-of-fe2-and-fe3-species-by-fiacrcicpms-in-antarctic-ice-samples(162b81af-6422-43fa-b371-f5c11b08b16d).html https://doi.org/10.1039/C1JA10276A |
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ftcopenhagenunip:oai:pure.atira.dk:publications/162b81af-6422-43fa-b371-f5c11b08b16d 2023-05-15T13:37:05+02:00 Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples Spolaor, A Vallelonga, Paul Travis Gabrieli, J Cozzi, G Boutron, C Barbante, C 2012-01-20 https://curis.ku.dk/portal/da/publications/determination-of-fe2-and-fe3-species-by-fiacrcicpms-in-antarctic-ice-samples(162b81af-6422-43fa-b371-f5c11b08b16d).html https://doi.org/10.1039/C1JA10276A eng eng info:eu-repo/semantics/restrictedAccess Spolaor , A , Vallelonga , P T , Gabrieli , J , Cozzi , G , Boutron , C & Barbante , C 2012 , ' Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples ' , Journal of Analytical Atomic Spectrometry , vol. 27 , no. 2 , pp. 310-317 . https://doi.org/10.1039/C1JA10276A article 2012 ftcopenhagenunip https://doi.org/10.1039/C1JA10276A 2022-02-24T00:08:10Z Iron is an element of great interest due to its role in primary production and in oceanic carbon cycle regulation, such that past changes in iron deposition may have influenced oceanic sequestration of atmospheric CO2 on millennial time scales. The behavior of iron in biological and environmental contexts depends strongly on its oxidation state. Solubility in water and the capacity to form complexes are just two important characteristics that are species dependent. Distinguishing between the two iron species, Fe(II) and Fe(III), is necessary to evaluate bioavailability, as Fe(II) is more soluble and therefore more readily available for phytoplankton uptake and growth. Here, we present a novel analytical method for iron speciation analysis using Collision Reaction Cell-Inductively Coupled Plasma-Mass Spectrometry (CRC-ICP-MS) and apply it to ice core samples from Talos Dome, Antarctica. The method detection limit is 0.01 ng g-1. A chelating resin, Ni-NTA Superflow, was used to separate the Fe species: At pH 2 the resin is capable of retaining Fe3+ with no retention of Fe2+. After the initial separation, we oxidized the Fe2+ using H2O2, and determined the Fe2+ concentration as the difference between the two measurements. Our preliminary results demonstrate higher Fe2+ concentrations during glacial periods than during interglacial periods. This elevated Fe2+ suggests that more iron was available for phytoplankton growth during the Last Glacial Maximum, than would be expected from measurements of proxies such as dust mass or total Fe. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core University of Copenhagen: Research Antarctic Talos Dome ENVELOPE(158.000,158.000,-73.000,-73.000) J. Anal. At. Spectrom. 27 2 310 317 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Iron is an element of great interest due to its role in primary production and in oceanic carbon cycle regulation, such that past changes in iron deposition may have influenced oceanic sequestration of atmospheric CO2 on millennial time scales. The behavior of iron in biological and environmental contexts depends strongly on its oxidation state. Solubility in water and the capacity to form complexes are just two important characteristics that are species dependent. Distinguishing between the two iron species, Fe(II) and Fe(III), is necessary to evaluate bioavailability, as Fe(II) is more soluble and therefore more readily available for phytoplankton uptake and growth. Here, we present a novel analytical method for iron speciation analysis using Collision Reaction Cell-Inductively Coupled Plasma-Mass Spectrometry (CRC-ICP-MS) and apply it to ice core samples from Talos Dome, Antarctica. The method detection limit is 0.01 ng g-1. A chelating resin, Ni-NTA Superflow, was used to separate the Fe species: At pH 2 the resin is capable of retaining Fe3+ with no retention of Fe2+. After the initial separation, we oxidized the Fe2+ using H2O2, and determined the Fe2+ concentration as the difference between the two measurements. Our preliminary results demonstrate higher Fe2+ concentrations during glacial periods than during interglacial periods. This elevated Fe2+ suggests that more iron was available for phytoplankton growth during the Last Glacial Maximum, than would be expected from measurements of proxies such as dust mass or total Fe. |
format |
Article in Journal/Newspaper |
author |
Spolaor, A Vallelonga, Paul Travis Gabrieli, J Cozzi, G Boutron, C Barbante, C |
spellingShingle |
Spolaor, A Vallelonga, Paul Travis Gabrieli, J Cozzi, G Boutron, C Barbante, C Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
author_facet |
Spolaor, A Vallelonga, Paul Travis Gabrieli, J Cozzi, G Boutron, C Barbante, C |
author_sort |
Spolaor, A |
title |
Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
title_short |
Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
title_full |
Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
title_fullStr |
Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
title_full_unstemmed |
Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples |
title_sort |
determination of fe 2+ and fe 3+ species by fia-crc-icp-ms in antarctic ice samples |
publishDate |
2012 |
url |
https://curis.ku.dk/portal/da/publications/determination-of-fe2-and-fe3-species-by-fiacrcicpms-in-antarctic-ice-samples(162b81af-6422-43fa-b371-f5c11b08b16d).html https://doi.org/10.1039/C1JA10276A |
long_lat |
ENVELOPE(158.000,158.000,-73.000,-73.000) |
geographic |
Antarctic Talos Dome |
geographic_facet |
Antarctic Talos Dome |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_source |
Spolaor , A , Vallelonga , P T , Gabrieli , J , Cozzi , G , Boutron , C & Barbante , C 2012 , ' Determination of Fe 2+ and Fe 3+ species by FIA-CRC-ICP-MS in Antarctic ice samples ' , Journal of Analytical Atomic Spectrometry , vol. 27 , no. 2 , pp. 310-317 . https://doi.org/10.1039/C1JA10276A |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1039/C1JA10276A |
container_title |
J. Anal. At. Spectrom. |
container_volume |
27 |
container_issue |
2 |
container_start_page |
310 |
op_container_end_page |
317 |
_version_ |
1766087972772380672 |