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Determination of conditional stability constants for some divalent transition metal ion-EDTA complexes by electrospray ionization mass spectrometry
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Chemical Engineering.ORCID iD: 0000-0002-5543-2041
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-3646-294X
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2014 (English)In: Journal of Mass Spectrometry, ISSN 1076-5174, E-ISSN 1096-9888, Vol. 49, no 7, 550-556 p.Article in journal (Refereed) Published
Abstract [en]

Conditional stability constants of coordination complexes comprising divalent transition metals, Cu2+, Ni2+, Zn2+, Co2+, and ethylenediaminetetraacetic acid (EDTA) were determined utilizing electrospray ionization mass spectrometry. The deviation of signal response of a reference complex was monitored at addition of a second metal ion. The conditional stability constant for the competing metal was then determined through solution equilibria equations. The method showed to be applicable to a system where Co2+ and Zn2+ competed for EDTA at pH 5. When Cu2+ and Ni2+ competed for EDTA, the equilibrium changed over time. This change was shown to be affected in rate and size by the type of organic solvent added. In this work, 30% of either methanol or acetonitrile was used. It was found that if calibration curves are prepared for both metal complexes in solution and the measurements are repeated with sufficient time space, any change in equilibrium of sample solutions will be discovered. Copyright © 2014 John Wiley & Sons, Ltd. Copyright © 2014 John Wiley & Sons, Ltd.

Place, publisher, year, edition, pages
2014. Vol. 49, no 7, 550-556 p.
Keyword [en]
chelating agent, conditional stability constant, EDTA, electrospray ionization mass spectrometry, mixed solvent
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-22614DOI: 10.1002/jms.3372ISI: 000339614300002Scopus ID: 2-s2.0-84904184855OAI: oai:DiVA.org:miun-22614DiVA: diva2:754594
Note

Correspondence Address: Norgren, M.; Fibre Science and Communication Network (FSCN), Mid Sweden University, SE-851 70 Sundsvall, Sweden; email: Magnus.Norgren@miun.se

Available from: 2014-10-10 Created: 2014-08-20 Last updated: 2016-09-29Bibliographically approved
In thesis
1. On metal ion chelates and conditional stability constant determination: Method development and selective ion flotation of chelating surfactants
Open this publication in new window or tab >>On metal ion chelates and conditional stability constant determination: Method development and selective ion flotation of chelating surfactants
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2014. 36 p.
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 111
National Category
Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-24029 (URN)978-91-87557-59-0 (ISBN)
Supervisors
Available from: 2015-01-02 Created: 2015-01-02 Last updated: 2015-03-13Bibliographically approved

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Boija, SusanneAlmesåker, AnnHedenström, ErikBylund, DanEdlund, HåkanNorgren, Magnus
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