@misc{10498/25513,
year = {2021},
month = {6},
url = {http://hdl.handle.net/10498/25513},
abstract = {Sherry wine vinegar is a Spanish gourmet product under Protected Designation of Origin (PDO). Before a vinegar can be labeled as Sherry vinegar, the product must meet certain requirements as established by its PDO, which, in this case, means that it has been produced following the traditional solera and criadera ageing system. The quality of the vinegar is determined by many factors such as the raw material, the acetification process or the aging system. For this reason, mainly producers, but also consumers, would benefit from the employment of effective analytical tools that allow precisely determining the origin and quality of vinegar. In the present study, a total of 48 Sherry vinegar samples manufactured from three different starting wines (Palomino Fino, Moscatel, and Pedro Ximenez wine) were analyzed by Fourier-transform infrared (FT-IR) spectroscopy. The spectroscopic data were combined with unsupervised exploratory techniques such as hierarchical cluster analysis (HCA) and principal component analysis (PCA), as well as other nonparametric supervised techniques, namely, support vector machine (SVM) and random forest (RF), for the characterization of the samples. The HCA and PCA results present a clear grouping trend of the vinegar samples according to their raw materials. SVM in combination with leave-one-out cross-validation (LOOCV) successfully classified 100% of the samples, according to the type of wine used for their production. The RF method allowed selecting the most important variables to develop the characteristic fingerprint ("spectralprint") of the vinegar samples according to their starting wine. Furthermore, the RF model reached 100% accuracy for both LOOCV and out-of-bag (OOB) sets.},
organization = {The authors would like to thank the winery Bodegas Paez Morilla S.A. for providing the Sherry vinegar samples and for the interest shown in the results of this study and Programa de Fomento e Impulso de la Actividad de Investigacion y Transferencia de la Universidad de Cadiz for the financial support of this manuscript.},
publisher = {MDPI},
keywords = {characterization},
keywords = {Fourier-transform infrared spectroscopy},
keywords = {cluster analysis},
keywords = {Sherry vinegar},
keywords = {spectralprint},
keywords = {random forest},
keywords = {support vector machine},
title = {A Methodology Based on FT-IR Data Combined with Random Forest Model to Generate Spectralprints for the Characterization of High-Quality Vinegars},
doi = {10.3390/foods10061411},
author = {Pérez Calle, José Luis and Ferreiro González, Marta and Ruiz Rodríguez, Ana and Fernández Barbero, Gerardo and Álvarez Saura, José Ángel and Palma Lovillo, Miguel and Ayuso Vilacides, Jesús},
}