IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Carbon isotope ratio (Δ13C) and phenolic profile used to discriminate wines from Dealu mare and Cotnari regions (Romania)

Carbon isotope ratio (Δ13C) and phenolic profile used to discriminate wines from Dealu mare and Cotnari regions (Romania)

Abstract

Regarding the food quality, authenticity is one of the most important issues in the context of ensuring the safety and security of consumers, but is also more important when it comes to wine (one of the most counterfeited foods in the world).

A batch of 28 wines of Romanian varieties obtained in two regions well known for the production of wines from Romania (Dealu Mare and Cotnari) was analyzed from a physical-chemical point of view in order to discriminate them according to geographical origin and variety. The assessment of the carbon isotope ratio in ethanol extracted from wine provides relevant information to validate the geographical origin of wines. At the same time, the phenolic compounds in wine composition are of great importance, they contribute to the formation of characteristics such as taste, color and structure. The profile of these compounds is very different depending on grape variety, climatic conditions in each area and the applied wine-making technology. Therefore, a correlation between the carbon isotope ratio and the phenolic compounds profile can provide an overview of wines of a certain variety or region. Thus, the carbon isotope ratio (δ13C) was determined for all wines in this batch, which varied between -27.13 and -25.83 for wines from the Dealu Mare region and between -28.27 and -25.66 for wines from the Cotnari region. Also 12 phenolic compounds (gallic acid, protocathecic acid, caftaric acid, caffeic acid, coumaric acid, trans resveratrol, hydroxytyrosol, tyrosol, procyanidin dimer B1 and procyanidin dimer B2, catechin and epicatechin) were identified and quantified.
The δ13C measurements have been performed using an elemental analyser VarioMicroCube, Elementar coupled to an isotope ratio monitoring by mass spectrometry (Isoprime, Elementar) while the phenolic compounds content was analyzed by high-performance liquid chromatography (HPLC-PDA). In order to differentiate the wine samples according to the geographical region and the variety, statistical analysis was applied and thus a good discrimination of the wines according to the region and at the same time of the varieties within the same region was achieved.

DOI:

Publication date: June 23, 2022

Issue: IVAS 2022

Type: Article

Authors

Cotea Valeriu1, Popirda Andreea1, Luchian Camelia Elena1, Colibaba Lucia Cintia1, Focea Elena Cornelia1, Nicola Sebastien2 and Noret Laurence2

1Iasi University of Life Sciences, Faculty of Horticulture, Department of Horticultural Technologies, 3rd M. Sadoveanu Alley, 700490 Iasi, Romania
2Université Bourgogne Franche-Comté, AgroSup Dijon, PAM UMR A 02.102, Institut Universitaire de la Vigne et du Vin – Jules Guyot, F-21000 Dijon, France

Contact the author

Keywords

wine, geographical origin, δ13C measurements, phenolic compounds analysis

Tags

IVAS 2022 | IVES Conference Series

Citation

Related articles…

Assessing macro-elements contents in vine leaves and grape berries of Vitis vinifera using near-infrared spectroscopy coupled with chemometrics

The cultivated vine (Vitis vinifera) is the main species cultivated in the world to make wine. In 2017, the world wine market represents 29 billion euros in exports, and France contributes 8.2 billion (28%) to this trade, making it a traditional market of strategic importance. Viticulture is therefore a key sector of the French agricultural economy. It is in this context that the nutritional diagnosis of the vine is of real strategic interest to winegrowers. Indeed, the fertilization of the vine is a tool for the winegrower that allows him to influence and regulate the quality of the wine.

Read More

Attractiveness and sweetness of red wines: Synergies between American oak barrels and mannoproteins

In partnership with a Bordeaux property wanting to improve the quality of its second wine, the effects of two factors, American oak barrels and mannoproteins were studied. Their impact on the attractiveness and sweetness of wines were characterized during two successive vintages (2012 and 2013). Vinification took place with a homogeneous batch of Cabernet Sauvignon. The wine was then divided up into various groups of five barrels of French and American oak, new or reused. Analyses of volatile and non-volatile wood compounds were undertaken at four months and eight months of wood ageing, by LC-MS and GC-MS.

Read More

Characterization of vineyard sites for quality wine production. German experiences

The quality of grapevines measured by yield and must density in the northern part of Europe conditons can be characterized as a type of “cool climate” – vary strongly from year to year and from one production site to another. One hundred year observations in Johannisberg from 1890 to 1991 demonstrate for the yield formation a clear dependancy from the year combined with a steady increase in productivity; latter a proof of positive clonal selection efforts.

Read More

Descriptive analysis of Sangiovese and Cabernet-Sauvignon wines from different terroirs in D.O.C. Bolgheri (Tuscany)

Different terroirs have been identified in Bolgheri area (a viticultural appellation in the Tirrenian coast of Tuscany) by the aid of pedological, landscape and agronomic observations in 1993. Numerous preliminary observations suggested that wines obtained from these different terroirs were unique.

Read More

The dynamics of δ13C and δ18O in musts during berries development

Aim: Many processes or reactions that occur in plants involved isotopic discrimination. Water availability, for example, affects the isotopic ratio of carbon (δ13C) and oxygen (δ18O). In viticulture, δ13C is used in experiments related to water relations and irrigation in vineyards. δ18O is used much less but it could be a good complement to δ13C. The aim of this study was to generate knowledge on how these isotopic ratios, measured in musts, could help to better understand the water behavior of grape varieties. 

Read More