interaction of cobalt(ii), nickel(ii) and zinc(ii) with humic-like ligands studied by esi-ms and ion-exchange method
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2016
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Abstract
An interaction of Co(II), Ni(II) and Zn(II) with humic acid and O-donor
humic-like ligands was studied by ion-exchange and electrospray ionization -
mass spectrometry (ESI-MS) method. Interactions were confirmed by differences
between values of chromatogram peak areas for monocomponent (ligand) and
binary systems (ligand with metal ion) by newly developed ESI-MS 5 μL Loop
injection technique. Schubert’s ion exchange method was used for
determination of stability constants of formed complexes at pH 4.0 and I =
0.01. Comparing the values of log Kmn for complexes formed by dipositive
metal ions with humic, benzoic and salicylic acids, it can be concluded that
the interaction strengths of transitional series metals follow the
Irving-Williams order: Co(II) < Ni(II) < Cu(II) > Zn(II). The obtained values
of log Kmn indicate that Pb(II) ions effect the strongest interactions with
all investigated ligands. Complexation of humic acids macromolecules
possessing O-donor binding sites as major binding sites can be predicted and
modelled following the same order of interaction strength like
Irving-Williams order. [Projekat Ministarstva nauke Republike Srbije, br.
III41018]
| Reference Key |
ivana2016journalinteraction
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|---|---|
| Authors | ;Kostić Ivana;Anđelković Tatjana;Anđelković Darko;Nikolić Ružica;Bojić Aleksandar;Cvetković Tatjana;Nikolić Goran |
| Journal | meditsinskaia radiologiia |
| Year | 2016 |
| DOI |
10.2298/JSC150917094K
|
| URL | |
| Keywords |
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