Vibrational Spectroscopy Combined with Chemometrics as Tool for Discriminating Organic vs. Conventional Culture Systems for Red Grape Extracts

Abstract

Food plants provide a regulated source of delivery of functional compounds, plant secondary metabolites production being also tissue specific. In grape berries, the phenolic compounds, flavonoids and non-flavonoids, are distributed in the different parts of the fruit. The aim of this study was to investigate the applicability of FTIR and Raman screening spectroscopic techniques combined with multivariate statistical tools to find patterns in red grape berry parts (skin, seeds and pulp) according to grape variety and vineyard type (organic and conventional). Spectral data were acquired and processed using the same pattern for each different berry part (skin, seeds and pulp). Multivariate analysis has allowed a separation between extracts obtained from organic and conventional vineyards for each grape variety for all grape berry parts. The innovative approach presented in this work is low-cost and feasible, being expected to have applications in studies referring to the authenticity and traceability of foods. The findings of this study are useful as well in solving a great challenge that producers are confronting, namely the consumers’ distrust of the organic origin of food products. Further analyses of the chemical composition of red grapes may enhance the capability of the method of using both vibrational spectroscopy and chemometrics for discriminating the hydroalcoholic extracts according to grape varieties.

Fruit and Vegetables Blockchain-Based Traceability Platform

“…This technique uses chemical, biochemical, biomolecu-lar, and isotopic techniques to determine the origin of products. We can see successful implementation in the literature for avocados [36], red grapes [37], tomatoes [38], and more.…”

Raman spectroscopic assessment of fibers and seeds of six cotton genotypes

“…While the score plot shows whether the samples are different, the corresponding loading plot shows the difference in the spectra and different polymorphs of the samples. Typically, two or three PCs could explain the most influential variables of the spectral variations (da Mata et al., 2022; Liu et al., 2015; Pećinar et al., 2021; Radulescu et al., 2021).…”

Observation of the Extraction Dynamics of Polyphenolic Compounds From Rosmarinus Officinalis and Salvia Officinalis in Natural Wine

“…Grape wine also contains a wide range of polyphenolic compounds and organic acids with antioxidant properties, which bring many health benefits when consumed in small or moderate amounts [9][10][11][12][13]. The principle underlying the production of therapeutic preparations called medicinal wines is the ability to extract polyphenols from plants macerated by the hydroalcoholic phase (wine), enriching the preparation in compounds with antioxidant action.…”