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http://hdl.handle.net/10198/15325
Título: | FTIR-ATR spectroscopy applied to quality control of grape-derived spirits |
Autor: | Anjos, Ofélia Santos, António J.A. Estevinho, Leticia M. Caldeira, Ilda |
Palavras-chave: | Alcoholic strength Attenuated total reflectance Fourier transform infrared spectroscopy Fusel alcohols Grape-derived spirits Methanol |
Data: | 2016 |
Citação: | Anjos, Ofélia; Santos, António J.A.; Estevinho, Letícia M.; Caldeira, Ilda (2016). FTIR-ATR spectroscopy applied to quality control of grape-derived spirits. Food Chemistry. ISSN 0308-8146. 205, p. 28-35 |
Resumo: | The Fourier transform infrared (FTIR) spectroscopic method with attenuated total reflectance (ATR) was used for predicting the alcoholic strength, the methanol, acetaldehyde and fusel alcohols content of grape-derived spirits. FTIR-ATR spectrum in the mid-IR region (4000-400 cm -1 ) was used for the quantitative estimation by applying partial least square (PLS) regression models and the results were correlated with those obtained from reference methods. In the developed method, a cross-validation with 50% of the samples was used for PLS analysis along with a validation test set with 50% of the remaining samples. Good correlation models with a great accuracy were obtained for methanol (r 2 = 99.4; RPD = 12.8), alcoholic strength (r 2 = 97.2; RPD = 6.0), acetaldehyde (r 2 = 98.2; RPD = 7.5) and fusel alcohols (r 2 from 97.4 to 94.1; RPD from 6.2 to 4.1). These results corroborate the hypothesis that FTIR-ATR is a useful technique for the quality control of grape-derived spirits, whose practical application may improve the efficiency and quickness of the current laboratory analysis. |
Peer review: | yes |
URI: | http://hdl.handle.net/10198/15325 |
DOI: | 10.1016/j.foodchem.2016.02.128 |
ISSN: | 0308-8146 |
Aparece nas colecções: | CIMO - Artigos em Revistas Indexados à WoS/Scopus |
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