Measuring marine iron(III) complexes by CLE-AdSV
Iron(iii) speciation data, as determined by competitive ligand exchange?adsorptive stripping voltammetry (CLE-AdSV), is reconsidered in the light of the kinetic features of the measurement. The very large stability constants reported for iron(iii) in marine ecosystems are shown to be possibly due to...
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ftunivwagenin:oai:library.wur.nl:wurpubs/344422 2024-02-04T10:04:43+01:00 Measuring marine iron(III) complexes by CLE-AdSV Town, R.M. van Leeuwen, H.P. 2005 application/pdf https://research.wur.nl/en/publications/measuring-marine-ironiii-complexes-by-cle-adsv https://doi.org/10.1071/EN05021 en eng https://edepot.wur.nl/24787 https://research.wur.nl/en/publications/measuring-marine-ironiii-complexes-by-cle-adsv doi:10.1071/EN05021 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Environmental Chemistry 2 (2005) 2 ISSN: 1448-2517 cathodic stripping voltammetry coordination iron-limited growth kinetics natural organic-ligands north pacific sea-water seawater southern-ocean speciation info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2005 ftunivwagenin https://doi.org/10.1071/EN05021 2024-01-10T23:26:09Z Iron(iii) speciation data, as determined by competitive ligand exchange?adsorptive stripping voltammetry (CLE-AdSV), is reconsidered in the light of the kinetic features of the measurement. The very large stability constants reported for iron(iii) in marine ecosystems are shown to be possibly due to an artefact of the technique, arising from the assumption that equilibrium is achieved between all iron(iii) species of relevance. Particular kinetic properties, related to the special nature of hydroxide as a metal complexant, have the consequence that CLE-AdSV measurements of iron(iii) in seawater generally correspond to the hydroxide complexes only. By the same token, dissolved hydroxide complexes are the key components of the bioavailable iron(iii) pool. The analysis presented herein opens opportunities to exploit CLE-AdSV for more rigorous investigation of the links between the speciation and the bioavailability of iron(iii). Article in Journal/Newspaper Southern Ocean Wageningen UR (University & Research Centre): Digital Library Pacific Southern Ocean Environmental Chemistry 2 2 80 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
cathodic stripping voltammetry coordination iron-limited growth kinetics natural organic-ligands north pacific sea-water seawater southern-ocean speciation |
spellingShingle |
cathodic stripping voltammetry coordination iron-limited growth kinetics natural organic-ligands north pacific sea-water seawater southern-ocean speciation Town, R.M. van Leeuwen, H.P. Measuring marine iron(III) complexes by CLE-AdSV |
topic_facet |
cathodic stripping voltammetry coordination iron-limited growth kinetics natural organic-ligands north pacific sea-water seawater southern-ocean speciation |
description |
Iron(iii) speciation data, as determined by competitive ligand exchange?adsorptive stripping voltammetry (CLE-AdSV), is reconsidered in the light of the kinetic features of the measurement. The very large stability constants reported for iron(iii) in marine ecosystems are shown to be possibly due to an artefact of the technique, arising from the assumption that equilibrium is achieved between all iron(iii) species of relevance. Particular kinetic properties, related to the special nature of hydroxide as a metal complexant, have the consequence that CLE-AdSV measurements of iron(iii) in seawater generally correspond to the hydroxide complexes only. By the same token, dissolved hydroxide complexes are the key components of the bioavailable iron(iii) pool. The analysis presented herein opens opportunities to exploit CLE-AdSV for more rigorous investigation of the links between the speciation and the bioavailability of iron(iii). |
format |
Article in Journal/Newspaper |
author |
Town, R.M. van Leeuwen, H.P. |
author_facet |
Town, R.M. van Leeuwen, H.P. |
author_sort |
Town, R.M. |
title |
Measuring marine iron(III) complexes by CLE-AdSV |
title_short |
Measuring marine iron(III) complexes by CLE-AdSV |
title_full |
Measuring marine iron(III) complexes by CLE-AdSV |
title_fullStr |
Measuring marine iron(III) complexes by CLE-AdSV |
title_full_unstemmed |
Measuring marine iron(III) complexes by CLE-AdSV |
title_sort |
measuring marine iron(iii) complexes by cle-adsv |
publishDate |
2005 |
url |
https://research.wur.nl/en/publications/measuring-marine-ironiii-complexes-by-cle-adsv https://doi.org/10.1071/EN05021 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Environmental Chemistry 2 (2005) 2 ISSN: 1448-2517 |
op_relation |
https://edepot.wur.nl/24787 https://research.wur.nl/en/publications/measuring-marine-ironiii-complexes-by-cle-adsv doi:10.1071/EN05021 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1071/EN05021 |
container_title |
Environmental Chemistry |
container_volume |
2 |
container_issue |
2 |
container_start_page |
80 |
_version_ |
1789973377875705856 |