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…

Influence of the type of flavonol and the presence of mannoproteins in the copigmentation with malvidin 3-O-glucoside

To study the copigmentation between different wine flavonols (myricetin, quercetin, kaempferol, isorhamnetin and syringetin 3-O-glucosides) and malvidin

Read More

Optimized grape seed protein extraction for wine fining

The extraction of proteins from grape seeds represents a promising strategy to revalorize wine industry by-products. As a natural endogenous fining agent, grape seed protein (GSE) offers an effective solution for wine clarification [1] without requiring label declaration.

Read More

Phototropic and geotropic shoot orientation: effect on physiological, vegetative and reproductive parameters

[English version below]

On a étudié l’effet de l’orientation des rameaux sur les paramètres physiologiques, végétatifs et reproductif durant deux saisons de croissance (2002/2003 et 2003/2004) dans la région de Stellenbosch dans une vignoble du cépage Merlot sur 99R conduite en espalier et taillé à cordon coursonné. Les vignes étaient espacées 2.7 x 1.5 m.

Read More

Les outils pour favoriser le renouvellement des générations en viticulture

French lawmakers have chosen the family-type winegrowing business as the benchmark for drafting the legal framework for winegrowing businesses and winegrowers. In france (source: msa), in 2022, there were 1,444 new winegrowers, an increase of 3% compared with 2021, representing 10% of new farm managers. The retention rate for winegrowers is 75% (up 13% on 2021), compared with 77% for all agricultural sectors (stable).

Read More

Evaluating alternatives to cold stabilization in wineries: the use of carboximethyl cellulose, potassium polyaspartate, electrodialysis and ion exchange resins – the results after one year in the bottle

The tartaric stabilization of wines before bottling to avoid the precipitation of tartaric acid salts is an important and common step during wine production. The presence of precipitated salt crystals in bottle wines is detrimental for their quality and even a legal issue in some countries. Cold stabilization is the most common stabilization treatment. Although it has been shown to be effective, it has some significant disadvantages, mainly regarding losses of color and aromas and its high cost. Therefore, other products and methodologies are being introduced in the wineries for the replacement of this process. Some of these new techniques involve the reduction of the ions causing the insolubilization of tartaric acid while other are based in the formation of protective colloids or the inhibition of the crystallization of salts. In this study, white, rosé and red wines have been treated with carboxymethylcellulose, potassium polyaspartate and an ion exchange resin. The tartaric stability of the wines, together with the oenological, chromatic and sensory characteristics were studied after the wines had been stored during one year in the bottle. The results indicate that the use of carboxymethyl cellulose and potassium polyaspartate maintained the best the sensory and chromatic characteristics and the wine stability of the wines in comparison with an untreated control wine.

Read More