Original scientific paper

https://doi.org/10.5562/cca4176

Solid State Characterization of Croatian Wine Grape Pomace by NMR and ATR-FTIR

Jelena Parlov Vuković ; Ruđer Bošković Institute, NMR Centre, Bijenička cesta 54, 10000 Zagreb, Croatia
Tomislav Jednačak ; University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia
Leda Divjak ; University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia
Katarina Smetko ; University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia
Marina Tišma ; Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, F. Kuhača 18, 31000 Osijek, Croatia
Ana-Marija Klarić ; Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, F. Kuhača 18, 31000 Osijek, Croatia
Ana-Marija Jagatić Korenika ; University of Zagreb, Faculty of Agriculture, Department of Viticulture and Enology, Svetošimunska cesta 25, 10000, Zagreb, Croatia
Ana Bucić-Kojić ; Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, F. Kuhača 18, 31000 Osijek, Croatia
Predrag Novak ; University of Zagreb, Faculty of Science, Department of Chemistry, Horvatovac 102a, 10000 Zagreb, Croatia *

* Corresponding author.

Supplements: cca4176_supplement.pdf

Abstract

Grape pomace (GP), the solid residues remained after production of the continental and coastal Croatian red wines, has been studied by solid-state NMR and ATR-FTIR methods. After collection, drying and milling, GP samples have been analysed by IR spectroscopy and characteristic vibrational bands have been assigned. The observed differences in some functional group vibrations have been detected for continental and coastal GPs as well as for different vintages. ¹³C cross-polarization magic angle spinning (CP MAS) NMR experiments provided further information on chemical composition of GPs and percentages of different compounds present in the samples such as polysaccharides and phenolic compounds. ³¹P MAS spectra gave valuable quantitative information on the phosphorus content. The GPs from the continental varieties contain much larger portion of phosphorus compared to coastal ones, which is important for their potential use as an attractive raw material and value-added compounds for industrial applications.

Keywords

grape pomace; solid-state characterization; ssNMR; ATR-IR

Hrčak ID:

333184

URI

https://hrcak.srce.hr/333184

Publication date:

3.2.2025.

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