Vitenskapelige artikler m/referee

Characterisation of selected South African young cultivar wines using FTMIR spectroscopy, gas chromatography and multivariate data analysis.

 

Nøkkeldata

Årstall 2009
Abstract The powerful combination of analytical chemistry and chemometrics and its application to wine analysis provides a way to gain knowledge and insight into the inherent chemical composition of wine and to objectively distinguish between wines. Extensive research programs are focused on the chemical characterization of wine in order to establish industry benchmarks and authentication systems. The aim of this study was to investigate the volatile composition and mid-infrared spectroscopic profiles of South African young cultivar wines with chemometrics in order to identify compositional trends and to distinguish between the different cultivars based on their composition. Data was generated by gas chromatography and FTMIR spectroscopy and investigated using analysis of variance (ANOVA), principal component analysis (PCA), and linear discriminant analysis (LDA). Significant differences were found in the volatile composition of the cultivar wines, with marked similarities in the composition of Pinotage wines and white wines. Of the 26 compounds that was analyzed, 14 had odor activity values higher than 1. The volatile composition and FTMIR spectra both contributed to the differentiation between the cultivar wines. The best discrimination model between the white wines was based on FTMIR spectra while a combination of spectra and volatile compounds was best to discriminate between the red wine cultivars.
Referanse Louw, L., Roux, K., Tredoux, A., Tomic, O., Næs, T., Nieuwoudt, H.H., Rensburg, P.V. 2009. Characterisation of selected South African young cultivar wines using FTMIR spectroscopy, gas chromatography and multivariate data analysis. Journal of Agricultural and Food Chemistry, Vol 57, pp 2623-2632.
Utgiver Journal of Agricultural and Food Chemistry,

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