Application of the new electroanalytical technique AGNES for the determination of free Zn concentration in river water
MetadataShow full item record
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.
Is part ofAnalytical and Bioanalytical Chemistry, 2010, vol. 397, num. 1, p. 389-394
European research projects
Showing items related by title, author, creator and subject.
AGNES: a technique for determining the concentration of free metal ions. The case of Zn(II) in coastal Mediterranean seawater Galceran i Nogués, Josep; Huidobro Redondo, César; Companys Ferran, Encarnació; Alberti, Giancarla (Elsevier, 2007)Absence of Gradients and Nernstian Equilibrium Stripping (AGNES) is a recently suggested electroanalytical technique designed for the determination of the free concentration of heavy metals (such as Zn, Cd or Pb) which is ...
A comparison between the determination of free Pb(II) by two techniques: Absence of gradients and Nernstian equilibrium stripping and resin titration Alberti, Giancarla; Biesuz, Raffaela; Huidobro Redondo, César; Companys Ferran, Encarnació; Puy Llorens, Jaume; Galceran i Nogués, Josep (Elsevier, 2007)Absence of gradients and Nernstian equilibrium stripping (AGNES) is an emerging electroanalytical technique designed to measure free metal ion concentration. The practical implementation of AGNES requires a critical selection ...
The impact of high Zn degrees concentrations on the application of AGNES to determine free Zn(II) concentration Galceran i Nogués, Josep; Chito Trujillo, Diana Maria; Martínez-Micaelo, Neus; Companys Ferran, Encarnació; David, Calin; Puy Llorens, Jaume (Elsevier, 2010-01-01)AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) determination of free Zn(II) in a solution can be affected by the reaching of high Zn° concentrations inside the amalgam. At concentrations about the solubility ...