FTIR-ATR spectroscopy applied to quality control of grape-derived spirits.

Abstract:

: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.

journal_name

Food Chem

journal_title

Food chemistry

authors

Anjos O,Santos AJ,Estevinho LM,Caldeira I

doi

10.1016/j.foodchem.2016.02.128

subject

Has Abstract

pub_date

2016-08-15 00:00:00

pages

28-35

eissn

0308-8146

issn

1873-7072

pii

S0308-8146(16)30296-5

journal_volume

205

pub_type

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