2026-04-14T05:02:53Zhttps://recercat.cat/oai/requestoai:recercat.cat:10459.1/489202024-12-05T22:45:58Zcom_2072_3622col_2072_479130
2024-12-05T22:45:58Z
urn:hdl:10459.1/48920
Application of the new electroanalytical technique AGNES for the determination of free Zn concentration in river water
Zavarise, Francesca
Companys Ferran, Encarnació
Galceran i Nogués, Josep
Alberti, Giancarla
Profumo, Antonella
Zinc
Aigua dolça
Anàlisi electroquímica
Zinc
Fresh water
Electrochemical analysis
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.
2024-12-05T22:45:58Z
2024-12-05T22:45:58Z
2015-11-06T08:52:31Z
2015-11-06T08:52:31Z
2010
2015-11-06T08:52:31Z
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://hdl.handle.net/10459.1/48920
Versió postprint del document publicat a: https://doi.org/10.1007/s00216-009-3439-8
Analytical and Bioanalytical Chemistry, 2010, vol. 397, num. 1, p. 389-394
(c) Springer Verlag, 2010
info:eu-repo/semantics/openAccess
Springer Verlag