2.5. Differential pulse voltammetry (DPV) and chronocoulometry
Anodic DP voltammograms were registered within the potential
range 0–1.3 V using the pulse amplitude 50 mV, pulse width 50 ms
and scan rate 10 mV s1
. Baseline correction using a moving average
algorithm included in the GPES software was applied for better
identification of oxidation peaks.
Chronocoulometric measurements were performed at 0.83 and
1.18 V for the red and white wines, respectively. The coulometric
signal was read for 100 s.