Universitat de Lleida
    • English
    • català
    • español
  • English 
    • English
    • català
    • español
  • Login
Repositori Obert UdL
View Item 
  •   Home
  • Recerca
  • Química
  • Articles publicats (Química)
  • View Item
  •   Home
  • Recerca
  • Química
  • Articles publicats (Química)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Determination of the complexing capacity of synthetic and real wine for Zn using Absence of Gradients and Nerstian Equilibrium Stripping technique

Thumbnail
View/Open
019538.pdf (625.7Kb)
Sol·licita una còpia
Issue date
2013-02-06
Author
Chito Trujillo, Diana Maria
Galceran i Nogués, Josep
Companys Ferran, Encarnació
Puy Llorens, Jaume
Suggested citation
Chito Trujillo, Diana Maria; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Puy Llorens, Jaume; . (2013) . Determination of the complexing capacity of synthetic and real wine for Zn using Absence of Gradients and Nerstian Equilibrium Stripping technique. Journal of Agricultural and Food Chemistry, 2013, vol. 61, núm. 5, p. 1051-1059. https://doi.org/10.1021/jf3037038.
Impact


Web of Science logo    citations in Web of Science

Scopus logo    citations in Scopus

Google Scholar logo  Google Scholar
Share
Export to Mendeley
Metadata
Show full item record
Abstract
The complexing capacity of synthetic (0.011 M tartrate in 13.5% ethanol) and real wine (Raimat Abadia) in titrations with added total Zn concentrations up to 0.03 M has been determined following the free Zn concentrations with AGNES (absence of gradients and Nernstian equilibrium stripping) technique. A correction to find the preconcentration factor or gain (Y1) really applied at each one of the ionic strengths reached due to Zn additions along the titration has been applied. The standard implementation of AGNES to real wine led to the observation of two anomalous behaviors: (a) an increasingly negative current in the deposition stage (labeled as “HER” effect) and (b) a minimum in the currents of the stripping stage plot (labeled as the “dip” effect). A practical strategy to apply AGNES avoiding the dip effect has been developed to quantify properly free Zn concentrations. The van den Berg–Ružic–Lee linearization method (assuming the existence of just 1:1 complexes) has been adapted to consider the dilution effect and the ionic strength changes. Aggregated stability constants and total ligand concentrations have been calculated from synthetic and wine titration data. The found complexing capacity in the studied wine (cT,L = 0.0179 ± 0.0007 M) indicates the contribution of ligands other than tartrate (which is confirmed to be the main one).
URI
http://hdl.handle.net/10459.1/47369
DOI
https://doi.org/10.1021/jf3037038
Is part of
Journal of Agricultural and Food Chemistry, 2013, vol. 61, núm. 5, p. 1051-1059
European research projects
Collections
  • Articles publicats (Química) [241]

Related items

Showing items related by title, author, creator and subject.

  • Determination of free Zn2+ concentration in synthetic and natural samples with AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) and DMT (Donnan Membrane Technique) 

    Chito Trujillo, Diana Maria; Weng, Liping; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Puy Llorens, Jaume; Riemsdijk, Willem H. van; Leeuwen, Herman P. van (Elsevier, 2012-04-01)
    The determination of free Zn2+ ion concentration is a key in the study of environmental systems like river water and soils, due to its impact on bioavailability and toxicity. AGNES (Absence of Gradients and Nernstian ...
  • 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 ...
  • Absence of Gradients and Nernstian Equilibrium Stripping (AGNES) for the determination of [Zn2+] in estuarine waters 

    Pearson, Holly B. C.; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Braungardt,Charlotte B.; Worsfold,Paul; Puy Llorens, Jaume; Comber, Sean (Elsevier, 2016-03-17)
    Zinc (Zn) has been classified as a 'Specific Pollutant' under Annex VIII of the EU Water Framework Directive by two thirds of the EU member states. As a result, the UK Environmental Quality Standard (EQS) for Transitional ...

Contact Us | Send Feedback | Legal Notice
© 2021 BiD. Universitat de Lleida
Metadata subjected to 
 

 

Browse

All of the repositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

Statistics

View Usage Statistics

D'interès

Política institucional d'accés obertDiposita les teves publicacionsDiposita dades de recercaSuport a la recerca

Contact Us | Send Feedback | Legal Notice
© 2021 BiD. Universitat de Lleida
Metadata subjected to