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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| Veröffentlicht in: | Geophysical research letters 2008-12, Vol.35 (24), p.n/a |
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| creator | Lacan, F. Radic, A. Jeandel, C. Poitrasson, F. Sarthou, G. Pradoux, C. Freydier, R. |
| 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 57Fe‐58Fe 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 δ57Fe = −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: ∣Δ57Fe(plankton‐seawater)∣ < 0.48‰. |
| doi_str_mv | 10.1029/2008GL035841 |
| format | Article |
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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 57Fe‐58Fe 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 δ57Fe = −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: ∣Δ57Fe(plankton‐seawater)∣ < 0.48‰.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2008GL035841</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; iron isotopic composition ; Ocean, Atmosphere ; open ocean ; Sciences of the Universe ; seawater</subject><ispartof>Geophysical research letters, 2008-12, Vol.35 (24), p.n/a</ispartof><rights>Copyright 2008 by the American Geophysical Union.</rights><rights>2009 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a5382-aec057d469f226620307c49f43f5b94c1bf67746e510cb9a4930e32f944db0db3</citedby><cites>FETCH-LOGICAL-a5382-aec057d469f226620307c49f43f5b94c1bf67746e510cb9a4930e32f944db0db3</cites><orcidid>0000-0002-4915-4719 ; 0000-0001-6560-6669 ; 0000-0001-6794-2279 ; 0000-0003-4097-2771 ; 0000-0001-6250-0391</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2008GL035841$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2008GL035841$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,776,780,881,1411,1427,11494,27903,27904,45553,45554,46388,46447,46812,46871</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21077879$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00399111$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Lacan, F.</creatorcontrib><creatorcontrib>Radic, A.</creatorcontrib><creatorcontrib>Jeandel, C.</creatorcontrib><creatorcontrib>Poitrasson, F.</creatorcontrib><creatorcontrib>Sarthou, G.</creatorcontrib><creatorcontrib>Pradoux, C.</creatorcontrib><creatorcontrib>Freydier, R.</creatorcontrib><title>Measurement of the isotopic composition of dissolved iron in the open ocean</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><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 57Fe‐58Fe 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 δ57Fe = −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: ∣Δ57Fe(plankton‐seawater)∣ < 0.48‰.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>iron isotopic composition</subject><subject>Ocean, Atmosphere</subject><subject>open ocean</subject><subject>Sciences of the Universe</subject><subject>seawater</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNp9kE1v1DAQhi0EEkvhxg_IBSSkBsYfieNjVdG0amgRAtGb5Thj1ZCNg50t9N_jJdWKUzWHGc0876uZIeQ1hfcUmPrAAJq2A141gj4hG6qEKBsA-ZRsAFSumayfkxcp_QAADpxuyOUnNGkXcYvTUgRXLLdY-BSWMHtb2LCdQ_KLD9N-NviUwniHQ-Fj7vjpHx1mzFOLZnpJnjkzJnz1kI_It7OPX0_Py-66vTg96UpT8YaVBi1UchC1cozVNcubSCuUE9xVvRKW9q6WUtRYUbC9MkJxQM5cvmboYej5EXm3-t6aUc_Rb02818F4fX7S6X0vH6cUpfSOZvbtys4x_NphWvTWJ4vjaCYMu6QZKCUb4Bk8XkEbQ0oR3cGZgt5_V___3Yy_efA1yZrRRTNZnw4aRkHKRqrMsZX77Ue8f9RTt186VuXIonIV-bTgn4PIxJ-6llxW-vtVq8Xnm_ZK3nAt-F_TEZVY</recordid><startdate>200812</startdate><enddate>200812</enddate><creator>Lacan, F.</creator><creator>Radic, A.</creator><creator>Jeandel, C.</creator><creator>Poitrasson, F.</creator><creator>Sarthou, G.</creator><creator>Pradoux, C.</creator><creator>Freydier, R.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>M7N</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0002-4915-4719</orcidid><orcidid>https://orcid.org/0000-0001-6560-6669</orcidid><orcidid>https://orcid.org/0000-0001-6794-2279</orcidid><orcidid>https://orcid.org/0000-0003-4097-2771</orcidid><orcidid>https://orcid.org/0000-0001-6250-0391</orcidid></search><sort><creationdate>200812</creationdate><title>Measurement of the isotopic composition of dissolved iron in the open ocean</title><author>Lacan, F. ; Radic, A. ; Jeandel, C. ; Poitrasson, F. ; Sarthou, G. ; Pradoux, C. ; Freydier, R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5382-aec057d469f226620307c49f43f5b94c1bf67746e510cb9a4930e32f944db0db3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>iron isotopic composition</topic><topic>Ocean, Atmosphere</topic><topic>open ocean</topic><topic>Sciences of the Universe</topic><topic>seawater</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lacan, F.</creatorcontrib><creatorcontrib>Radic, A.</creatorcontrib><creatorcontrib>Jeandel, C.</creatorcontrib><creatorcontrib>Poitrasson, F.</creatorcontrib><creatorcontrib>Sarthou, G.</creatorcontrib><creatorcontrib>Pradoux, C.</creatorcontrib><creatorcontrib>Freydier, R.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lacan, F.</au><au>Radic, A.</au><au>Jeandel, C.</au><au>Poitrasson, F.</au><au>Sarthou, G.</au><au>Pradoux, C.</au><au>Freydier, R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Measurement of the isotopic composition of dissolved iron in the open ocean</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. 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| subjects | Earth sciences Earth, ocean, space Exact sciences and technology iron isotopic composition Ocean, Atmosphere open ocean Sciences of the Universe seawater |
| title | Measurement of the isotopic composition of dissolved iron in the open ocean |
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