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Comparative study of wine tannin classification using Fourier transform mid-infrared spectrometry and sensory analysis.
Fernández, Katherina; Labarca, Ximena; Bordeu, Edmundo; Guesalaga, Andrés; Agosin, Eduardo.
Afiliação
  • Fernández K; Department of Chemical Engineering and Bio-Processes, Pontificia Universidad Católica de Chile, Santiago, Chile.
Appl Spectrosc ; 61(11): 1163-7, 2007 Nov.
Article em En | MEDLINE | ID: mdl-18028694
Wine tannins are fundamental to the determination of wine quality. However, the chemical and sensorial analysis of these compounds is not straightforward and a simple and rapid technique is necessary. We analyzed the mid-infrared spectra of white, red, and model wines spiked with known amounts of skin or seed tannins, collected using Fourier transform mid-infrared (FT-MIR) transmission spectroscopy (400-4000 cm(-1)). The spectral data were classified according to their tannin source, skin or seed, and tannin concentration by means of discriminant analysis (DA) and soft independent modeling of class analogy (SIMCA) to obtain a probabilistic classification. Wines were also classified sensorially by a trained panel and compared with FT-MIR. SIMCA models gave the most accurate classification (over 97%) and prediction (over 60%) among the wine samples. The prediction was increased (over 73%) using the leave-one-out cross-validation technique. Sensory classification of the wines was less accurate than that obtained with FT-MIR and SIMCA. Overall, these results show the potential of FT-MIR spectroscopy, in combination with adequate statistical tools, to discriminate wines with different tannin levels.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Limiar Sensorial / Taninos / Vinho / Espectroscopia de Infravermelho com Transformada de Fourier / Biologia Computacional Tipo de estudo: Prognostic_studies Idioma: En Revista: Appl Spectrosc Ano de publicação: 2007 Tipo de documento: Article País de afiliação: Chile País de publicação: Estados Unidos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Limiar Sensorial / Taninos / Vinho / Espectroscopia de Infravermelho com Transformada de Fourier / Biologia Computacional Tipo de estudo: Prognostic_studies Idioma: En Revista: Appl Spectrosc Ano de publicação: 2007 Tipo de documento: Article País de afiliação: Chile País de publicação: Estados Unidos