RT journal article
T1 Simultaneous Detection of Glucose and Fructose in Synthetic Musts by Multivariate Analysis of Silica-Based Amperometric Sensor Signals
A1 Crespo-Rosa, Joaquín Rafael
A1 Foca, Giorgina
A1 Ulrici, Alessandro
A1 Pigani, Laura
A1 Zanfrognini, Barbara
A1 Cubillana Aguilera, Laura
A1 Palacios Santander, José María
A1 Zanardi, Chiara
A2 Química Analítica
K1 sonogel-carbon
K1 Au nanoparticles
K1 composite
K1 silica-based electrodes
K1 amperometric sensors
K1 glucose
K1 fructose
K1 principal component analysis
K1 blind analysis
AB Silica-based electrodes which permanently include a graphite/Au nanoparticles composite were tested for non-enzymatic detection of glucose and fructose. The composite material showed an effective electrocatalytic activity, to achieve the oxidation of the two analytes at quite low potential values and with good linearity. Reduced surface passivation was observed even in presence of organic species normally constituting real samples. Electrochemical responses were systematically recorded in cyclic voltammetry and differential pulse voltammetry by analysing 99 solutions containing glucose and fructose at different concentration values. The analysed samples consisted both in glucose and fructose aqueous solutions at pH 12 and in solutions of synthetic musts of red grapes, to test the feasibility of the approach in a real frame. Multivariate exploratory analyses of the electrochemical signals were performed using the Principal Component Analysis (PCA). This gave evidence of the effectiveness of the chemometric approach to study the electrochemical sensor responses. Thanks to PCA, it was possible to highlight the different contributions of glucose and fructose to the voltammetric signal, allowing their selective determination.
PB MDPI
SN 1424-8220
YR 2021
FD 2021-06
LK http://hdl.handle.net/10498/25457
UL http://hdl.handle.net/10498/25457
LA eng
NO This research received funding from the University of Cadiz through the 'Contratos Puente 2015' postdoctoral program and from the University of Modena and Reggio Emilia (Italy) through FAR 2014.
DS Repositorio Institucional de la Universidad de Cádiz
RD 14-nov-2026