Application of Functional Data Analysis and FTIR-ATR Spectroscopy to discriminate wine spirits ageing technologies
Subject
FTIR-ATR FDA Vector analysis Wine spirit Ageing technology Micro-oxygenation Wood Oak Chestnut Ageing time
Date
2020-10-23T14:42:03Z 2020-10-23T14:42:03Z 2020
Description
Fourier transform infrared spectroscopy (FTIR) with Attenuated Total Reflection (ATR)
combined with functional data analysis (FDA) was applied to differentiate aged wine spirits
according to the ageing technology (traditional using 250 L wooden barrels versus alternative
using micro-oxygenation and wood staves applied in 1000 L stainless steel tanks), the wood species
used (chestnut and oak), and the ageing time (6, 12, and 18 months). For this purpose, several features
of the wine spirits were examined: chromatic characteristics resulting from the CIELab method,
total phenolic index, concentrations of furfural, ellagic acid, vanillin, and coniferaldehyde, and total
content of low molecular weight phenolic compounds determined by HPLC. FDA applied to spectral
data highlighted the differentiation between all groups of samples, confirming the differentiation
observed with the analytical parameters measured. All samples in the test set were differentiated and
correctly assigned to the aged wine spirits by FDA. The FTIR-ATR spectroscopy combined with FDA
is a powerful methodology to discriminate wine spirits resulting from different ageing technologies. info:eu-repo/semantics/publishedVersion
