Work

Classification of the geographical origin of Pinot noir wines from southwestern Switzerland using isotopes, volatile organic compounds, and chemometrics

Year: 2025

Type: article

Abstract: This study examined the potential of carbon and nitrogen isotopes of wine solid residues with semi-quantitative amounts of volatile organic compounds to characterize Pinot noir wines from different regions in southwestern Switzerland. Significant differences in the 13 C/ 12 C (−30.6 to −26.4 mUr), 15 N/ 14 N (0.6–6.7 mUr), C/N (25–102), and contents of 38 volatiles exist between the wines. Principal component analysis identified three distinct clusters of wine regions: Valais, southern Vaud–Geneva, and Three Lakes. These clusters corresponded to a gradient in altitude, precipitation, temperature, and air humidity. The wine samples were satisfactorily classified according to their geographical origin using linear discriminant analysis on isotopic and molar ratios (84.8 % accurate prediction), selected volatile compounds (90.9 % accurate prediction), and the combination of both (95.5 % accurate prediction). Soil factors and aging in oak barrels did not affect the ability to classify wines based on the isotopic ratios and semi-quantified volatile compounds.

Source: Food Chemistry

DOI: 10.1016/j.foodchem.2025.145147

Authors: Jorge Enrique Spangenberg, Julien Baumann, Vivian Zufferey

Institutions: University of Lausanne, Agroscope

Language: English

Topic: Horticultural and Viticultural Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: hybrid

Estimated APC paid: $4,930

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Université de Lausanne