Speciation of Zn, Fe, Ca and Mg in wine with the Donnan Membrane Technique
Fecha de publicación2018
MetadatosMostrar el registro completo del ítem
Free concentrations of Zn2+, Fe3+, Ca2+ and Mg2+ in a red wine (Raimat, Catalonia, Spain) have been determined, with the Donnan Membrane Technique (DMT) for the first time. The required equilibration time benefits from the acceptor solution including major cations. K+ and Na+, mainly unbound to any ligand in the sample, have been identified as suitable reference ions. A free Zn concentration of 1.76 micromol L-1 determined with DMT was in excellent agreement with the free Zn concentration independently provided by the electroanalytical technique Absence of Gradients and Nernstian Equilibrium Stripping (AGNES), 1.7 micromol L-1, amounting to 14.4% of the total Zn. The free concentrations found in this wine were 1.79 micromol L-1 Fe3+, 1.11 mmol L 1 Ca2+ and 3.4 mmol L-1 Mg2+ (8.82%, 40% and 57% of their total concentrations). Prior to the application of the techniques to the red wine, they had been cross-validated in Zn-tartrate solutions.
Es parte deFood Chemistry, 2018, vol. 239, p. 1143-1150
Proyectos de investigación europeos
El ítem tiene asociados los siguientes ficheros de licencia:
Excepto si se señala otra cosa, la licencia del ítem se describe comocc-by-nc-nd, (c) Elsevier, 2017
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 ...
Determination of the complexing capacity of synthetic and real wine for Zn using Absence of Gradients and Nerstian Equilibrium Stripping technique Chito Trujillo, Diana Maria; Galceran i Nogués, Josep; Companys Ferran, Encarnació; Puy Llorens, Jaume (American Chemical Society, 2013-02-06)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 ...