Application of Fourier-Transform Infrared Spectroscopy for the Assessment of Wine Spoilage Indicators: A Feasibility Study
Cláudia Andreia Teixeira dos Santos,
Ricardo Nuno Mendes Jorge Páscoa,
Nuria Pérez-del-Notario,
José Maria González-Sáiz,
Consuelo Pizarro,
João Almeida Lopes
Affiliations
Cláudia Andreia Teixeira dos Santos
REQUIMTE, Laboratório de Química Aplicada, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
Ricardo Nuno Mendes Jorge Páscoa
REQUIMTE, Laboratório de Química Aplicada, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
Nuria Pérez-del-Notario
Departmento de Química, Universidad de La Rioja, C/Madre de Dios 51, 26006 Logrono, La Rioja, Spain
José Maria González-Sáiz
Departmento de Química, Universidad de La Rioja, C/Madre de Dios 51, 26006 Logrono, La Rioja, Spain
Consuelo Pizarro
Departmento de Química, Universidad de La Rioja, C/Madre de Dios 51, 26006 Logrono, La Rioja, Spain
João Almeida Lopes
Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
Wine aroma is one of the most frequently used and explored quality indicators. Typically, its assessment involves estimating the volatile composition of wine or highly trained assessors conducting sensory analysis. However, current methodologies rely on slow, expensive and complicated analytical procedures. Additionally, sensory evaluation is inherently subjective in nature. Therefore, the aim of this work is to verify the feasibility of using FTIR spectroscopy as a fast and easy methodology for the early detection of some of the most common off-odors in wines. FTIR spectroscopy was combined with partial least squares (PLS) regression for the simultaneous measurement of isoamyl alcohol, isobutanol, 1-hexanol, butyric acid, isobutyric acid, decanoic acid, ethyl acetate, furfural and acetoin. The precision and accuracy of developed calibration models (R2P > 0.90, range error ratio > 12.1 and RPD > 3.1) proved the ability of the proposed methodology to quantify the aforementioned compounds.
