2026-04-18T04:32:39Zhttps://recercat.cat/oai/requestoai:recercat.cat:10459.1/489202024-12-05T22:45:58Zcom_2072_3622col_2072_479130
RECERCAT
author
Zavarise, Francesca
author
Companys Ferran, Encarnació
author
Galceran i Nogués, Josep
author
Alberti, Giancarla
author
Profumo, Antonella
2024-12-05T22:45:58Z
2024-12-05T22:45:58Z
2015-11-06T08:52:31Z2015-11-06T08:52:31Z20102015-11-06T08:52:31Z
http://hdl.handle.net/10459.1/48920
Absence of gradients and Nernstian equilibrium stripping (AGNES) is a recently developed electroanalytical technique specifically designed for the direct determination of free concentrations of metal ions. AGNES is applied here to the determination of free Zn concentration in a river water sample. The method has been validated with synthetic solutions of low ionic strengths containing Zn and 2,6-pyridinedicarboxylic acid and then applied to synthetic river waters and to a natural sample collected from Besòs River in Montcada i Reixac (Catalonia, North-Eastern Spain). In the river sample, an average free Zn concentration of 12.8(4) nM was obtained, while the total dissolved Zn concentration was 0.51(8) μM. To control and maintain pH and pCO2 constant during AGNES measurements, a novel device for N2/CO2 mixed purging has been developed.
(c) Springer Verlag, 2010 info:eu-repo/semantics/openAccess
Zinc
Aigua dolça
Anàlisi electroquímica
Zinc
Fresh water
Electrochemical analysis
Application of the new electroanalytical technique AGNES for the determination of free Zn concentration in river water
info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion