Cyclic voltammetry and second-order chemometric-assisted data applied to the determination of gallic acid in red wines

MONTEMERLO ANTONELLA; AZCARATE SILVANA; CAMIÑA JOSE; MESSINA GERMÁN

JOURNAL OF FOOD COMPOSITION AND ANALYSIS

ACADEMIC PRESS INC ELSEVIER SCIENCE

Lugar: Amsterdam; Año: 2024

0889-1575

Wine is an alcoholic beverage widely consumed around the world. Assessing its quality involves various chemical analyses, including the determination of phenolic profile. Phenolic compounds are a family of substances prone to oxidation, with gallic acid being the most abundant in red wines. Generally, the most frequently used analytical methods for gallic acid analysis in wines comprise time-consuming techniques such as HPLC and UPLC chromatographies. Therefore, having innovative and rapid analytical methods to accurately measure its concentration in this beverage is crucial. Electrochemical methods combined with chemometric tools represent a promising solution. This study proposes an approach that utilizes the MCR-ALS algorithm to model second-order voltammetric data generated from changes in scan rate. Data preprocessing and subsequent mathematical modeling allowed the gallic acid quantification with detection limits (LOD) of 5.9 mg L-1, which is below the stipulated concentrations for the analyte in wine samples. Quantification was possible even in the presence of unmodeled interferences, thus leveraging the advantage of higher-order multivariate calibrations. These innovative approaches offer the possibility of obtaining accurate results directly, rapidly, and reliably, representing an advancement for quality control in the wine industry and opening new perspectives for wine quality analysis through innovative methodologies.