title: An insight into the adsorption and electrochemical processes occurring during the analysis of copper and lead in wines, using an electrochemical quartz crystal nanobalance.
abstract: Copper and lead in wine were quantified by anodic stripping voltammetry (ASV), performed onto the gold electrode of a piezoelectric quartz crystal. Both current or mass changes could be used as analytical signals, without a statistical difference in the results (α=0.05). However, the plot of mass vs. potential provided an in depth understanding of the electrochemical processes and allowed studying adsorption phenomena. Copper interaction with fructose is an example of a process which was not possible to ignore by observing the mass change on the gold electrode of the piezoelectric quartz crystal.
authors.affiliation: CESAM and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
authors.forename: Alzira
authors.initials: A
authors.lastname: Yamasaki
authors.forename: João A B P
authors.initials: JA
authors.lastname: Oliveira
authors.forename: Armando C
authors.initials: AC
authors.lastname: Duarte
authors.forename: M Teresa S R
authors.initials: MT
authors.lastname: Gomes
mesh_terms: D000327:Adsorption; D003300:Copper / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D005632:Fructose / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D007854:Lead / Q000032:analysis*; D058525:Quartz Crystal Microbalance Techniques; D013499:Surface Properties; D014920:Wine / Q000032:analysis*
chemical_list: D007854:Lead; D005632:Fructose; D006046:Gold; D003300:Copper