Naslov
Vanadium(IV) and vanadium(V) complexation with succinic acid by affinity capillary electrophoresis

Autori
Knežević, Lucija ; Zanda, Emanuele ; Bura-Nakić, Elvira ; Sladkov, Vladimir

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts of the 3rd European NECTAR Conference / Gama, Sofia ; Kozlevčar, Bojan ; Lukšič, Miha ; Milea, Demetrio ; Perdih, Franc ; Šarac, Bojan - Ljubljana : Univerza v Ljubljani, 2022, 41-42

ISBN
978-961-7078-29-9

Skup
3rd European NECTAR Conference

Mjesto i datum
Ljubljana, Slovenija, 24.08.2022. - 26.08.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
vanadium ; capillary electrophoresis ; succinic acid ; complex stability

Sažetak
The complexation of different vanadium species (+IV and +V) with succinic acid was examined by affinity capillary electrophoresis (ACE) in aqueous acid solutions at different pH values (1.5, 2.0 and 2.5). In this study, succinic acid is chosen as a complexing agent for V(IV) and V(V) species as it can be used as a simple model of structurally more complex NOM. ACE is based on the change in the electrophoretic mobility of detected species due to the interaction with other species present in the electrolyte. The injected sample contains a fixed amount of V species. A set of runs is performed using (H, Na)ClO4 mixtures at constant pH and ionic strength (0, 1 M), while the background electrolyte (BGE) contains varying amounts of succinic acid. The change in electrophoretic mobility with the increase of ligand concentration in the BGE is used to assess the speciation and equilibrium constants. Obtained data allow us to unravel the formation of protonated V(IV) and V(V) complex species and calculate their stability constant values.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

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