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Determination of conditional stability constants for some divalent transition metal ion-EDTA complexes by electrospray ionization mass spectrometry
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FSCN)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FSCN)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik.ORCID-id: 0000-0002-5543-2041
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.ORCID-id: 0000-0002-3646-294X
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2014 (engelsk)Inngår i: Journal of Mass Spectrometry, ISSN 1076-5174, E-ISSN 1096-9888, Vol. 49, nr 7, s. 550-556Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2014. Vol. 49, nr 7, s. 550-556
Emneord [en]
chelating agent, conditional stability constant, EDTA, electrospray ionization mass spectrometry, mixed solvent
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-22614DOI: 10.1002/jms.3372ISI: 000339614300002Scopus ID: 2-s2.0-84904184855OAI: oai:DiVA.org:miun-22614DiVA, id: diva2:754594
Merknad

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

Tilgjengelig fra: 2014-10-10 Laget: 2014-08-20 Sist oppdatert: 2017-12-05bibliografisk kontrollert
Inngår i avhandling
1. On metal ion chelates and conditional stability constant determination: Method development and selective ion flotation of chelating surfactants
Åpne denne publikasjonen i ny fane eller vindu >>On metal ion chelates and conditional stability constant determination: Method development and selective ion flotation of chelating surfactants
2014 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Sundsvall: Mid Sweden University, 2014. s. 36
Serie
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 111
HSV kategori
Identifikatorer
urn:nbn:se:miun:diva-24029 (URN)978-91-87557-59-0 (ISBN)
Veileder
Tilgjengelig fra: 2015-01-02 Laget: 2015-01-02 Sist oppdatert: 2015-03-13bibliografisk kontrollert

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

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