An insight into the adsorption and electrochemical processes occurring during the analysis of copper and lead in wines, using an electrochemical quartz crystal nanobalance.

► Concentrations of copper and lead obtained from current or mass were not statistically different. ► The use of a piezoelectric quartz crystal allowed studying non-electrochemical processes. ► The piezoelectric crystal allowed to detect copper interaction with fructose. ► The piezoelectric crystal distinguished wine sample pre-treatment during the ASV of copper.