IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Application of a low-cost device VIS-NIRs-based for polyphenol monitoring during the vinification process

Application of a low-cost device VIS-NIRs-based for polyphenol monitoring during the vinification process

Abstract

In red wine production, phenolic maturity is becoming increasingly important. Anthocyanins, flavonoids and total polyphenols content and availability significantly influence the harvest time of wine grapes while, during vinification process, their extraction strongly affects wine body, color and texture. The polyphenol presence in musts and wines, over that by the grape berry accumulation and the cellular maturity, is significantly influenced by maceration and fermentation techniques. To date, polyphenol evaluation is performed using destructive, laborious, expensive and often environmental unfriendly methods of analysis. Nowadays, companies that want to be competitive in a global market must necessarily undergo to a process of innovation and digital transformation. In this context, the GO-SmartData project (smart management of vineyard and cellar) aims to identify a rapid, economical, easy-to-use and non-destructive technologies for monitoring fermenting musts and wines. Here, the application of a low-cost mini-sensor based on Visible and Near Infrared (VIS-NIR) spectroscopy designed to operate into 19 selected spectral bands between 410 and 1720 nm is proposed. The prototype is designed to collect, directly from the wine tanks, data to be send to an in-cloud system (IoT) and computed into numerical values, according to predictive statistical modelling. The spectra detection through the VIS-NIR prototype has been performed on fermenting musts and aging wines concomitantly with analytical measurement of polyphenols. Predicting models were built using multivariate regressive approaches (PLS) which were then tested for accuracy and robustness in terms of correlation (R2), as well as potential errors (RMSEC, RMSEP). The VIS-NIR prototype shows quite promising performances and aptitudes for becoming an easy-to-use device destined to the on-line employment in the vinery environment

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Modesti Margherita¹, Alfieri Gianmarco¹, Pardini Luca², Cerreta Raffaele¹, Mencarelli Fabio²and Bellincontro Andrea¹

¹Department for innovation in biological, agro-food and forest system Tuscia University
²Department of Agriculture Food and Environment (DAFE), University of Pisa

Contact the author

Keywords

Non-destructive analyses, spectrophotometry, polyphenols, NIR, phenolics

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.