An assessment of voltammetry on disposable screen printed electrodes to predict wine chemical composition and oxygen consumption rates
Journal : Food Chemistry , vol. 15 , 2022
Publisher : Elsevier
International Standard Numbers
Printed : 0308-8146
Electronic : 1873-7072
Publication type : Academic article
Issue : 365
DOI : doi.org/10.1016/j.foodchem.202...
Quality and measurement methods
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The present work aimed at determining the applicability of linear sweep voltammetry coupled to disposable carbon paste electrodes to predict chemical composition and wine oxygen consumption rates (OCR) by PLS-modeling of the voltammetric signal. Voltammetric signals were acquired in a set of 16 red commercial wines. Samples were extensively characterized including SO2, antioxidant indexes, metals and polyphenols measured by HPLC. Wine OCRs were calculated by measuring oxygen consumption under controlled oxidation conditions. PLS-Regression models were calculated to predict chemical variables and wine OCRs from first order difference voltammogram curves. A significant number of fully validated models predicting chemical variables from voltammetric signals were obtained. Interestingly, monomeric and polymerized anthocyanins can be differently predicted from the first and second wave of the first derivative of voltammograms, respectively. This fast, cheap and easy-to-use approach presents an important potential to be used in wineries for rapid wine chemical characterization.